Chapter M (1)

_Macaire_, vegetable physiology in relation to rotation of crops, xxiii, 138. ----, injurious action of gases on vegetation, xxiii, 193. ----, on nitrogen in animal substances, xxiii, 384. ----, experiments on hydrochloric acid, xi, 393.

_McConnell, B. R._, notice of a revolving electro-magnetic instrument,
xxxiii, 188.

_McCord, J. S._, meteorological observations at Montreal, 1836-40,
xli, 330.

_MacCulloch, J._, essay on remittent and intermittent fevers,
xviii, 338.

_McGuire, W. W._, on the prairies of Alabama, xxvi, 93;--causes of,
xxvi, 96.

Machine for cleaning grain invented, iv, 387. ---- and its model, relation between, _E. Sang_, xxiv, 264.

Machines, examination of, maximum and minimum effect of, _A. B. Quinby_, xii, 346. ----, electrical, see _Electrical_.

Machinery, use of soapstone in diminishing friction of, xiii, 192. ---- and manufactures, economy of, xxiv, 105.

Macle, see _Chiastolite_.

_Maclure, W._, on different systems of education, ix, 160, 163. ----, on the Pestalozzian system of, ix, 163; x, 145. ----, geological arrangement, outlines of, i, 209. ----, systematic arrangement of rocks and their probable origin, vii, 261. ----, geological systems, geological maps, and chatoyant feldspar, ix, 253. ----, ---- changes in N. America, conjectures on, east of the Stoney mountains, vi, 98. ----, ---- remarks on Mexico, xx, 406. ----, igneous theory of the earth, remarks on, xv, 384; xvi, 351. ----, on Mosaic geology, ix, 157. ----, passage to Mexico of, xv, 400. ----, memoir of, _S. G. Morton_, xlvii, 1.^f ----, list of works of, xlvii, 16.

Maclurite, description of, v, 246. ----, analysis of, _H. Seybert_, v, 336. ----, identical with chondrodite, v, 366. ----, in New Jersey, v, 343.

Madeira, notice of, xxiv, 238. ----, wines of, xxiv, 240.

Mæcenas, bust of, xxxiv, 51.

_Maerenhaut, J. A._, on Otaheite, xxix, 283.

_Magendie, F._, on the mechanism of absorption in animals, iii, 288. ----, on prussic acid, ii, 81.

Magic, natural, remarks on, xxxiii, 258.

Magnesia, effect of, on soil, xli, 159. ----, solubility of, v, 378. ----, in compact limestones, large proportion of, _R. E. Rogers_, xli, 171. ----, carbonate of, of Staten Island, N. Y., i, 142; v, 266. ----, ----, in Pennsylvania, i, 236; xiv, 18. ----, hydrate of, description and analysis of, iv, 245. ----, ----, in New Jersey, i, 55; iv, 17; v, 267. ----, ----, in Hoboken, i, 54; iv, 17; vii, 370. ----, ----, from Shetland, vii, 365. ----, nitrate of, i, 133. ----, sulphate of, i, 133; ii, 375; xv, 241. ----, ----, native in New York State, xv, 241. ---- and soda, sulphate of, xlviii, 189.

Magnesian carbonate of lime, in N. York, analyses of, _L. C. Beck_, xlvi, 34. ---- hydrate of silica. Harford Co., Md., _P. T. Tyson_, xviii, 79. ---- ---- ---- identity of, with Deweylite, _C. U. Shepard_, xviii, 81. ---- pseudomorphs, and metamorphic changes, xlviii, 89.

Magnesite, hard, from Baumgarten, Silesia, vii, 368. ----, in N. York, v, 267; xlvi, 34. ----, in Maryland, xiv, 12. ----, in Pennsylvania, xiv, 9, 10.

Magnesium, notice of, xix, 197, 379; xxvii, 196. ----, obtained by _W. W. Mather_, xx, 408.

Magnets, cast iron, xxxiii, 265. ----, chemical action in needles suspended from, xviii, 402. ----, best position of, for mutual action, _H. Lloyd_, xxxviii, 96. ----, current produced by the rotation of, _Pixii_, xxiv, 144, 146.^f ----, electric spark from, _J. Henry_, xxii, 403. ----, a mode of producing sparks and galvanic currents from the horse shoe, _J. P. Emmet_, xxiv, 78.^f ----, new method of making permanent, xxxvi, 335.^f ----, galvanic, construction of, _J. B. Zabriskie_, xxxvi, 124.^f ----, ----, Henry's large, xix, 408.^f ----, ----, made for Laboratory of Yale College, xx, 201. ----, ----, Humbert's, xxxviii, 204. ----, ----, Ganby's, xxix, 354. ----, ----, Page's, xxxv, 253.^f ----, ----, E. M. Clarke's, xxxiii, 213.^f ----, ----, see farther under _Electro-Magnetic_ and _Magneto-Electric_. ----, musical tones from, _C. G. Page_, xxxii, 396; xxxiii, 118; xlviii, 401. ----, cause of voltaic currents with, _J. P. Emmet_, xxvi, 23.^f ----, native, in Rhode Island, iv, 285; v, 402.

Magnetic attraction and repulsion, law of, _R. W. Fox_, xxviii, 370. ---- ---- ---- reciprocating motion of, _J. Henry_, xx, 340.^f ---- chart, of the U. States, _E. Loomis_, xxxiv, 290; xxxix, 41. ---- compass, mariner's, on the invention of, _A. Humboldt_, xl, 242. ---- dip, in different parts of the world, _T. H. Perry_, xlvii, 84. ---- ----, at different places in Europe, xl, 30. ---- ----, in Ireland, _H. Lloyd_, xxxv, 296. ---- ----, at Perth, Scotland, xl, 342. ---- ----, at St. Petersburg, xxi, 382. ---- ----, at different places in the U. States, xl, 380. ---- ----, ibid, _J. Locke_, xxxix, 319; xl, 149; xli, 15. ---- ----, ----, ibid, remarks on, xxxix, 325. ---- ----, ibid, _E. Loomis_, xxxiv, 290^f; xxxix, 41^f; xl, 85. ---- ----, at various places in Ohio and Michigan, _E. Loomis_, xxxviii, 397. ---- ----, ---- ibid, at Cincinnati, _J. Locke_, xl, 56. ---- ----, at Philadelphia and Baltimore, _A. D. Bache_, xl, 375. ---- ----, at Baltimore, _J. Locke_ and _J. N. Nicollet_, xlii, 239. ---- ----, at Nantucket, _W. Mitchell_, xlvi, 157. ---- ----, daily variation in, _Kupffer_, xxv, 194. ---- ---- and intensity determined by one instrument, _H. Lloyd_, xxxviii, 179. ---- discoveries by _H. H. Sherwood_, xxxiv, 210. ---- effects from Hare's calorimotor, _G. T. Bowen_, v, 357. ---- experiments, showing the effect of cold and heat on steel bars, _Kupffer_, xxv, 194. ---- influence of the sun's rays, xiii, 188; xviii, 181. ---- ---- of the violet ray, xviii, 171. ---- instrument, new, called a Solar Index, _M. Conant_, xlix, 301.^f ---- iron, see _Iron_. ---- intensity, at great elevations, _J. D. Forbes_, xxxi, 369. ---- ----, at different places in Europe, xl, 30. ---- ----, in Ireland, _H. Lloyd_, xxxv, 296. ---- ----, daily variation and changes in, _H. Lloyd_, xlvi, 391. ---- ----, in different places in the United States, xl, 378. ---- investigations, by _W. Scoresby_, xlviii, 33. ---- needle, dipping, theory of adjusting, _T. H. Perry_, xxxvii, 277. ---- ----, ----, manipulations of, _J. Locke_, xlii, 235. ---- ----, dip of, see _Magnetic dip_. ---- ----, on the influence of the Aurora on, xxxiv, 285. ---- ----, ibid, _Franklin_, xvi, 148. ---- ----, ibid, _J. Henry_, xxii, 143. ---- ----, ibid, of Jan., 1837, New Haven, xxxii, 179. ---- ----, ibid, in July, 1837, xxxiii, 146. ---- ----, ibid, at Schenectady, Jan., 1837, &c., _B. F. Joslin_, xxxv, 152. ---- ----, ibid, Nov. 14, 1837, _E. C. Herrick_, xxxiv, 269. ---- ----, ibid, xl, 48. ---- ----, ibid, May, 1840, at Toronto, xl, 337. ---- ----, ibid, as seen at Greenwich, xl, 338. ---- ----, influence of coasts on the deflection of, xxviii, 62. ---- ----, ---- of heating to the temperature of boiling water, xxxviii, 180. ---- ----, influence of iron cooled to a low red heat, xxix, 348. ---- ----, improvement in the manufacture of, _A. Eaton_, xii, 14. ---- ----, improvement in, reply to the same, xii, 232. ---- ----, made of thin plates not in contact, _W. Scoresby_, xxxiv, 398. ---- ----, oscillations of, differing near different metals, xv, 182. ---- ----, polarity and dip of, a remark on, xxix, 353. ---- ----, made to indicate the true north, xxvi, 90. ---- ----, on the connexion of the theory of the earth with the secular variations of, _J. H. Lathrop_, xxxviii, 68. ---- needles, best position of three, for mutual action, _H. Lloyd_, xxxviii, 96. ---- observations, a union of effort urged for carrying on, xviii, 380. ---- ----, great scheme for, by the Royal Society of London, xxxvii, 198. ---- ----, ibid, by British Association, xl, 335; xlii, 151; xliii, 374. ---- ----, in Russia and other countries, in progress, xlii, 153. ---- ----, coöperation of the Amer. Acad. of Arts and Sciences in a general system of, xxxix, 193. ---- ----, corresponding, by _A. D. Bache_ and _H. Lloyd_, xli, 260. ---- observatory at Dublin, xxxiv, 3. ---- poles, revolution of the two, xxix, 352. ---- polarity, notice of, _D. H. Barnes_, xiii, 70. ---- ----, reply to _D. H. Barnes_, xiv, 121. ---- ---- of rocks, xx, 198. ---- power of a galvanic battery, v, 388. ---- separating machine for magnetic ores of iron, used at Franconia, xviii, 289. ---- variation, daily, different in different places, xix, 189. ---- ----, at Perth, Scotland, xl, 342. ---- ----, at Paris, France, xxxi, 190. ---- ----, remarks on, _N. Bowditch_, xvi, 64. ---- ----, for the United States, _E. Loomis_, xxxiv, 290^f; xxxix, 41^f; xliii, 106. ---- ----, table made from observations at Boston, Falmouth and Penobscot, xvi, 60. ---- ----, at Providence, R. I., _M. B. Lockwood_, xliv, 314. ---- ----, at Troy, N. Y., xvii, 198. ---- ----, in some parts of New York State, xxxvi, 28. ---- ----, in Connecticut, _G. Gillet_, xxiii, 205. ---- ----, at Yale College, xxx, 221. ---- ----, at Westchester, Pa., observations by _A. D. Bache_, xxvii, 385.

Magnetism, animal, v, 192; xiii, 175. ----, _Davis's_ Manual of, xliii, 381. ---- of the earth, especially of the arctic regions, _E. Sabine_, xvii, 145.^f ---- ----, causes of, _B. F. Joslin_, xix, 398. ---- ----, views of _J. Hamilton_, xxxvii, 100. ---- ----, views of _S. L. Metcalf_, xxvii, 153. ---- ----, views of _Rowall_, xli, 41. ---- ----, effect of, on the precipitation of silver, xvi, 262. ---- chemical effects of, viii, 374. ----, supposed influence of, in combinations and crystallizations, by _O. L. Erdmann_, xviii, 395. ----, influence of, xvi, 262. ----, connexion of, with electricity, iii, 386.^f ----, connexion of, with heat and electricity, _J. F. Dana_, vi, 163. ----, ----, with light, _G. Gibbs_, i, 89. ----, ----, with geology, _J. Locke_, xlvii, 101. ----, conversion of, into electricity, xxii, 386. ----, currents and sparks of electricity from, _J. Henry_, xxii, 403. ----, destroyed by lightning, xii, 382. ----, Gauss's theory of, tested by observations, _E. Loomis_, xlvii, 278. ----, _Hansteen's_ discovery in, v, 190. ----, influence of heat on, xxii, 361. ---- of soft iron, acquired by induction, retained for some time if the armature is not removed, xxviii, 63. ----, molecular forces, on the disturbance of, by, _C. G. Page_, xxxiii, 118. ---- produced by friction, xix, 394. ---- ---- by a stroke of lightning, vi, 394. ---- ---- by voltaic electricity, iii, 383. ---- ---- by the solar rays, xiii, 171. ----, double helix for inducing, _C. G. Page_, xxxv, 261.^f

Magnetization, some phenomena of, _De Nairac_, xxvii, 401.^f

Magneto-electric apparatus, and experiments, _J. P. Emmet_, xxiv, 78^f; xxvi, 311; xxviii, 331. ---- - ---- ---- ----, _J. Henry_, xxviii, 331. ---- - ---- ---- ----, _E. M. Clarke_, xxxiii, 213.^f ---- - ---- ---- ----, _C. G. Page_, xxxiv, 163^f, 364^f; xxxv, 112^f, 252^f; xxxvii, 275^f; xlviii, 392. ---- - ---- ----, _O. W. Gibbs_, xxxix, 132. ---- - ---- ---- ----, _J. H. Abbot_, xl, 104.^f ---- - ---- electrepeter, _E. M. Clarke_, xxxiii, 224.^f ---- - ---- ----, _C. G. Page_, xxxv, 112.^f ---- - ---- electrotome, _C. G. Page_, xxxv, 112^f, 253.^f ---- - ----, formula, xxxv, 356.^f ---- - ---- multiplier, _C. G. Page_, xxxvii, 275.^f ---- - ---- shock increased by a long coil, _J. Henry_, xxviii, 331. ---- - ---- ---- increased by passing it through a portion of the generating magnet, _J. P. Emmet_, xxviii, 331.

Magneto-electricity, _J. Locke_, xxxiv, 125.^f

Magnetometer, new, _A. D. Bache_, xl, 380.

Magnolia grandiflora, xxvi, 314.

Mahogany, artificial, ix, 206.

Mahomet Ali, notice of, xxviii, 30.

Maine, geological reports of _C. T. Jackson_ on, noticed, xxxii, 193; xxxv, 387; xxxvi, 143; xxxvii, 376. ----, miscellaneous remarks on the geology of, _C. T. Jackson_, xxxiv, 69; --actual bituminization of peat, xxxiv, 73. ----, anthracite coal formation of, _C. T. Jackson_, xxxvi, 149. ----, dikes of trap, and metamorphic limestone, _C. T. Jackson_, xxxvi, 145, 147. ---- iron ore veins, _C. T. Jackson_, xxxvi, 147, 150. ----, changes of level in, _C. T. Jackson_, xxxvi, 154. ----, fossiliferous rocks near Moose river, xxxvii, 378.

Maine, list of some plants in, _J. W. Bailey_, xxxii, 22. ----, minerals of Freyburg and Paris, xviii, 291.

_Mairan_, on the Aurora Borealis, allusion to, xxix, 388; xxxii, 177;
xxxiv, 288, 289.

Maize, from the graves of ancient Peruvians, germination of, ix, 208. ----, sugar from, xliv, 215.

Majorca, notice of a part of, xxvii, 83.

Malachite, in Connecticut, vi, 206, 232. ----, in Massachusetts, i, 115. ----, in New York, viii, 249. ----, in Pennsylvania, i, 236. ----, of Lake Superior copper mines, vii, 45.

Malacrone, a new mineral, xlix, 394.

Malaria, remarks on, xvii, 300; xviii, 339. ----, _T. Hopkins_ on, xxxvii, 196. ---- of the Campagna di Roma, xxii, 336.

Malate of lime, in sumach, _W. B. Rogers_, xxvii, 294.

Malic acid, _J. Liebig_, xxi, 156.

Malva Lecontii, xlv, 176. ---- Nutalloides, xxvi, 313. ---- triangulata, vii, 62.

Mammalia, fossil, in Great Britain, xlvii, 186. ----, see farther under _Zoology_.

Mammoth, first use of the name, xix, 388. ----, see farther under _Zoology_. ---- Cave, Ky., alabaster (gypsum in curved forms) in, _J. Locke_, xlii, 206.^f

Mandingo, native, from near the river Gambia, account of, xxxv, 305.

Manganese, separation of, from zinc, xlvii, 194; xlviii, 187. ----, commercial value of its ores, how ascertained, _E. Turner_, xxi, 364. ----, electricity of peroxide of, xxx, 179. ----, examination of the peroxide of, _H. C. Lea_, xlii, 81. ----, two sulphates of, xvi, 383. ---- ores, analyses of, _P. Berthier_, vii, 366. ---- ores, method of assaying, xxviii, 146. ---- ----, in Connecticut, phosphate, xiii, 196. ---- ores, in Maryland, iv, 283; xxvii, 20, 33. ---- ----, in Massachusetts, ii, 374; iv, 54, 189; vii, 253; viii, 30, 233; ix, 42; xxii, 61;--siliceous, vii, 251; ix, 22; xxii, 62. ---- ----, in New York, xlvi, 28. ---- ----, in N. Carolina, v, 258. ---- ----, in Nova Scotia, xv, 157. ---- ----, in Pennsylvania, iv, 38; xiv, 4, 12. ---- ----, in Rhode Island, viii, 231; ix, 248; xl, 185; --ferro-silicate, with a figure, _C. U. Shepard_, xvii, 142.^f ---- ----, in Virginia, iii, 245.

Manilla hemp, account of, xxi, 29; xli, 200.^f

_Mantell, G. A._, museum of, xxiii, 162^f; xxviii, 194. ----, ----, specimens from, noticed, xxviii, 197. ----, _C. Lyell's_ remarks at the presentation of the Wollaston medal to, xxviii, 391. ----, presentation of a microscope to, xliii, 206. ----, description of some fossil fruits, xlv, 401. ----, discovery of the Iguanodon, xxvii, 355.^f ----, notice of molluskite, xlv, 243. ----, on the geological age of reptiles, xxi, 359. ----, on the Unionidæ of the country of the Iguanodon, xlvii, 402.^f ----, on Zoophytes, xxxiii, 329. ----, Wonders of Geology, review of, xxxiv, 387; xxxix, 1. ----, letter to _J. Deane_, xlv, 189. ----, Medals of Creation, review of, xlviii, 105.

Manufactories of Lowell, xxvii, 346. ----, limitation of the labor of children in, xii, 194.

Manures, action of, _De la Giraudieu_, xxvi, 179. ----, action of gypsum in, xxvi, 181. ----, marl for, from Chesapeake Bay, xx, 411. ----, ----, from New Jersey, _J. Pierce_, vi, 237. ----, remarks on calcareous, xxx, 138, 383. ----, use of muriate of lime for, ix, 194.

Map of Maryland, 1835, xxx, 393; xxxii, 191. ---- of mountains, iii, 364.

Maps, on contoured, _Larcom_, xlvi, 394. ----, a mode of illustrating criminal statistics by, xxxi, 379.

Mapping instrument, xx, 159.

Maranta arundinacea, v, 302.

Marble, Carrara, an altered oolite, xxx, 176. ----, and flagstones, strength of, _E. Hodgkinson_, xliv, 168. ----, durability of, as compared with granite, xv, 168. ----, in Massachusetts, white, iv, 40; viii, 14; xxii, 28. ----, ----, clouded, viii, 14. ----, ----, dove colored, viii, 14. ----, ----, elastic, of Lanesboro' and West Stockbridge, viii, 15. ----, ----, ---- and flexible, of Berkshire, Co., ix, 241. ----, ----, tortuous layers of, viii, 28. ---- in Vermont, xxxv, 390. ---- in Connecticut, ii, 141, 165, 219, 222. ---- ----, verd antique in Connecticut, ii, 165. ---- in New York, at Hudson, transition, vi, 371. ---- ----, in the Stonybrook Mts., v, 29. ---- ----, serpentine, v, 29. ----, Potomac breccia, xxvi, 221; xxvii, 22. ----, of Maryland, xxvii, 24, 27. ---- ----, white, of Hagerstown, v, 264; xxvi, 222. ---- in Kentucky, iii, 234. ---- in Missouri, iii, 23. ----, yellow, of Tabriz, xxxvii, 355.

_Marcet, F._, influence of the moon on the weather, xxvii, 192. ----, boiling point in vessels of different materials, xlvii, 190.

Mariner's compass, the invention of, _A. Humboldt_, xl, 242.

Marl, apparatus for analyzing, _W. B. Rogers_, xxvii, 299.^f ---- from Farmington, Ct., analysis of, _E. Hitchcock_, xxxvi, 176. ---- in New York, iii, 237. ---- for manure, from near the Chesapeake Bay, xx, 411. ---- of New Jersey, identical with the chalk of England, _S. G. Morton_, xxii, 90. ---- ---- ----, analysis of, xvii, 277. ---- ---- ----, on the application of, to agriculture, _J. Pierce_, vi, 237. ----, shell, in Maryland, xxvii, 3. ---- beds of Virginia, xi, 54. ---- pits, in N. Carolina, organic remains of, _H. B. Croom_, xxvii, 168. ---- from Ashley river, S. C., composition of, _J. L. Smith_, xlviii, 101. ---- ---- ---- infusorial character of, _J. W. Bailey_, xlviii, 102. ---- in Wayne Co., Ohio, xxxi, 55. ----, red calcareous, in Texas, _J. L. Riddell_, xxxvii, 211.

Marmalite, description and analysis of, _T. Nuttall_, iv, 17, 19.

_Marsh, R._, meteorological register, xlix, 212.

Marsupial fossils of the Stonesfield slate, xxvii, 412; xxxvii, 228. ---- ----, see under _Zoology_.

Martha's Vineyard, notices of geology of, vii, 240.^f ---- ----, ibid, _C. Lyell_, xlvi, 318.

_Martin, A. St._, account of the opening into his stomach, and
experiments on the gastric juice of, _W. Beaumont_, xxvi, 194.

_Martin, J._, on the central forces of bodies revolving about fixed
axes, xxxix, 262.^f

_Martius, C. F. P. von_, on the spiritual life of plants, xl, 170. ----, works of, noticed, xlv, 217; xlviii, 207.

Maryland, Bare Hills, near Baltimore, _H. H. Hayden_, xxiv, 349.^f ----, minerals of, _G. W. Carpenter_, xiv, 1. ----, ---- of Baltimore and Harford Cos., _P. T. Tyson_, xviii, 78. ----, chromic iron of, iv, 321; xxiv, 349, 355; xxvii, 18, 20. ----, Appalachian chain in, _W. E. A. Aikin_, xxvi, 219.^f ----, notice of the Geological Report and Map of, _J. T. Ducatel_ and _J. H. Alexander_, xxvii, 1; xxx, 393; xxxii, 191. ----, Mastodon longirostris in, xliii, 143. ----, caves in, containing saltpetre, xxvii, 33. ----, coal in, _J. T. Ducatel_ and _J. H. Alexander_, xxvii, 29. ----, ----, chemical analysis of, ibid, xxvii, 31. ----, tertiary fossils of, _I. Lea_, xxv, 422. ----, infusoria in, xlvi, 137^f; xlviii, 201, 330.^f

_Mason, E. P._, micrometric measures of eclipse of the sun, Sept. 1838, xxxv, 174. ----, on some nebulæ, xl, 37. ----, obituary notice of, xl, 407; xliii, 381.

_Mason, O._, chemical examination of the bark of the white birch,
xx, 282.

Masonite, description and analysis of, _C. T. Jackson_, xl, 186. ----, composition of, xlviii, 218.

Massachusetts, geology and mineralogy of a section of, with a part
of New Hampshire and Vermont, including notices of rocks, soil,
changes in the river, Indian relics at Deerfield, minerals, &c.,
_E. Hitchcock_, i, 105.^f
----, ibid of Connecticut valley, _E. Hitchcock_, vi, 1^f, 201^f;
--granite, 2;
granitic veins, 12;
graphic granite, 16.
----, geology and mineralogy of Connecticut valley, _E. Hitchcock_,
pseudomorphous granite, vi, 17;
gneiss, 18; vii, 29;
hornblende slate, vi, 20;
mica slate, 22;
talcose slate, 26;
chlorite slate, 27;
syenite, vi, 28;
trap, 31, 44;
argillite, 35;
granular limestone, 37;
sandstone, 39;
fossil bones, 43;
coal formations, 61; vii, 28;
fossil fish, vi, 76;
localities of various minerals, ores, &c. 201; vii, 30.
----, scenery of, and miscellaneous notices, _E. Hitchcock_, vii, 1;
--Mount Holyoke, &c. 5, 9, 10;
Bellows Falls, 12;
Turner's Falls, 13;
ancient lakes, 16;
Sunderland cave, 19;
Goshen graphic granite, 22^f;
pseudomorphous granite, 22.^f
----, tabular arrangement of the rocks of, _E. Hitchcock_, vii, 24.
----, Report on the Geology of, _E. Hitchcock_, xxii, 1^f;
--Economical Geology, giving an account of the soils from different
rocks, &c., 1;
useful rocks and minerals, 13;
granite quarries, prices, &c., 14;
gneiss quarries, &c., 18;
quartz rock, 22;
mica and talcose slate, 23;
limestone, 24;
marble, 28;
serpentine, 29;
steatite or soapstone, 31;
slates, clays, peat, &c., 23, 38;
buhrstone, 40;
coal, 41;
graphite, 46;
mineral waters, 47;
metals and their ores, 50.
----, ---- (second) on the Economical Geology of, including remarks
on soils and modes of analysis adopted by _S. L. Dana_, xxxvi, 363.
----, ---- on the Geology of, noticed, xxiii, 389; xxvi, 213;
xxxvi, 363; xli, 384.
----, Report on the water courses, terraces, ancient lakes, and the
alluvial and rock formations of, _A. Smith_, xxii, 205.^f
----, geology and mineralogy of the vicinity of Williams College,
Williamstown, including notices of the Taconic range, of granite,
gneiss, quartz, granular limestone, and other rocks and minerals,
_C. Dewey_, i, 337.^f
----, ---- and mineralogy of western, including a small part of the
adjoining states, _C. Dewey_, viii, 1^f, 240;
--granite, 4;
gneiss, 5;
mica slate, 6;
trap and hornblende rocks, 9;
syenite, 10;
serpentine, 11;
granular limestone, 13;
quartz rock, 16;
argillaceous slate, &c., 18;
dip and course, 27;
ores and minerals, 30, 243;
alternations of mica slate and granular limestone, 15, 240.
----, geology of the vicinity of Lowell, xxvii, 340.
----, ---- Hampshire Co., with an account of the lead mines, _A. Nash_,
xii, 238.^f
----, ---- Martha's Vineyard and the Elizabeth Islands, vii, 240^f;
xlvi, 318.
----, granite veins and beds of Chester, _E. Emmons_, viii, 250.^f
----, coal in, _E. Hitchcock_, vi, 61; vii, 28; xxii, 41; xxxvi, 377.
----, ----, at Wrentham, xxiii, 405.
----, ----, at Mansfield, _C. T. Jackson_, xxxiv, 395.
----, ----, probable age of, _C. Lyell_, xlvii, 214.
----, footprints in sandstone of, see _Footprints_.
----, fossil fish of, _E. Hitchcock_, iii, 222, 365; vi, 76.^f
----, cave in Mount Toby, i, 111.
----, caves in Western, viii, 15.
----, mineral localities, _C. Dewey_, i, 337; viii, 1.
----, ---- ----, _E. Hitchcock_, i, 112; vi, 201; vii, 30; xiv, 215.
----, ---- ---- of Chesterfield and Goshen, _G. Gibbs_, i, 346.
----, ---- ---- of Charlestown quarries, _J. E. Teschemacher_,
xxxviii, 194.
----, ---- ----, see farther under the names of the different minerals.
----, steatite or soapstone in, xxii, 31; xxvii, 341, (see _Steatite_.)
---- lead mines, vi, 204; ix, 166, 249; xii, 238^f; xxii, 56.
---- iron ores, v, 20; vi, 208, 209; x, 14; xxii, 50; xxxvi, 378.
----, tin in, xvi, 188; xxii, 62.
----, indications of gold in, xxii, 63.
----, graphite or plumbago in, vi, 248; viii, 54; x, 18; xviii, 377;
xxii, 46.
----, ---- of Worcester, probable age of, _C. Lyell_, xlvii, 214.
----, statistical tables of, xxxiv, 213.
----, ---- ---- of Boston, xxxix, 395.
----, Indian relics, at Deerfield, i, 108.
----, Mount Holyoke, height of, i, 112.
----, latitude and longitude of Deerfield, i, 112.
----, Lebanon mineral spring, viii, 21.

Mastodon, tooth of, _J. Wyman_, xxxix, 53. ----, dental system, xl, 377. ---- remains, in Connecticut, at Berlin, xxvii, 165. ---- ----, ----, at Cheshire, xiv, 187. ---- ----, in New York, near Rochester, xix, 358^f; xxxiii, 201. ---- ----, ----, in Orange Co., xxxi, 171. ---- ----, in New Jersey, _J. Van Rensselaer_, xi, 246. ---- ----, in Virginia, Wythe Co., xxvii, 352. ---- ----, ----, geological age of, xxvii, 352. ---- ----, in North Carolina marl pits, Craven Co., _H. B. Croom_, xxvii, 168. ---- ----, in Ohio, near Massillon, xxx, 394; xxxi, 56. ---- ----, ----, in Crawford Co., _J. W. Foster_, xxxvi, 189.^f ---- ----, ----, in Pickaway Co., _C. Atwater_, ii, 245^f; xxv, 256. ---- ----, in Tennessee, near Nashville, xxvii, 354. ---- ----, Big Bone Lick, Ky., and elsewhere, geological position of, _C. Lyell_, xlvi, 320. ---- ----, in Missouri, iii, 22; xxxvii, 191. ---- ----, ----, Gasconade Co., xxxvi, 199. ---- ----, ----, bones from near St. Louis, obtained by _A. Koch_, xl, 56. ---- skeleton, found on the Morris canal, xiv, 188. ---- ----, found on the Delaware and Hudson canal, xiv, 31. ---- longirostris in Maryland, xliii, 143. ---- tooth, in Louisiana, _W. M. Carpenter_, xxxiv, 201.

Matches, kindling without fire, i, 308. ----, lucifer, by whom first made, xviii, 148.

Mathematics, review of the Cambridge course of, v, 304.

Mathematical instrument, short notice of a new, iv, 377. ---- problems, _T. Strong_, ii, 54^f, 266.^f

_Mather, W. W._, mode of obtaining aluminium and magnesium, xx, 408. ----, chloride of aluminium and its analysis, xxvii, 241. ----, hydrated chloride of aluminium, xxvii, 253. ----, solubility of bitungstate of ammonia, xxvii, 264. ----, disulphuret of bismuth, xxiv, 189; xxvii, 264. ----, bromine and iodine in the salt springs of Ohio, xlix, 211. ----, new method of cupellation, xxxv, 321. ----, Georgia gold, xxvii, 255. ----, crystalline form of iodine, xviii, 84.^f ----, ibid, of xanthite, xviii, 359.^f ----, amalgam of platinum, xxvii, 263. ----, iodide of mercury, xxvii, 263. ----, chloriodide of platinum, xxvii, 258. ----, perchloride of platinum, xxvii, 262. ----, iodide of potassium and platinum, xxvii, 257. ----, reduction of iron and silver ores, and on some Mexican and S. American silver mines, xxiv, 213. ----, silver of Lane's mine, Connecticut, xxvii, 256. ----, crystallized tin from solution, xxvii, 254. ----, non-conducting power of water, in relation to heat, xiii, 368.^f ----, instrument for measuring the expansion of solids, xxx, 324.^f ----, on the possible variation of the length of the day, xlvi, 344. ----, a geological section through a part of Connecticut from Killingly to Haddam, xxi, 94.^f ----, geology of the Highlands of New York, xxi, 97. ----, geological survey of Ohio, xxxiv, 196, 347; xl, 126. ----, physical geology of the U. States, east of the Rocky Mountains, xlix, 1, 284. ----, elevation of sedimentary rocks of United States, causes of, xlix, 284. ----, protest with reference to G. W. Featherstonhaugh, xxxiii, 205.

Matter, infinite divisibility of, _E. Adams_, xxviii, 163. ----, ---- ----, _S. Clark_, ix, 356. ----, ---- ----, _W. Whewell_, xxxviii, 113. ----, ---- ----, xxxix, 55.^f ----, heavy, demonstration of, _W. Whewell_, xlii, 264. ----, ----, reply to _W. Whewell_ on, _R. Hare_, xlii, 260. ----, motion the natural state of, xvi, 151. ----, on the vitality of, xv, 54.

_Matteucci, C._, on electric currents in the nerves, xlix, 387. ----, on animal electricity, xxi, 157; xxxii, 198; xlix, 388. ----, on the decomposition of metallic salts, xx, 187. ----, influence of heat on magnetism, xxii, 361. ----, on atmospheric electricity, xxx, 376.

Mauch Chunk, river, canal and coal region, _B. Silliman_, xix, 7.^f ----, notice of, xx, 163.

Mauna Loa, Hawaii, character of, xvi, 346. ---- ---- and Mauna Kea, Sandwich Islands, xi, 4. ---- ----, see farther under _Volcano_.

_Mauran, J._, improved instrument for venous injection, xxiii, 114.^f

_Maury, M. F._, description of an alembic for distilling amalgam of gold, xxxiii, 66.^f ----, on the gold veins of the U. States mine near Fredericksburg, Va., xxxii, 325. ----, on the navigation of Cape Horn, xxvi, 54. ----, on the Gulf Stream and currents of the sea, xlvii, 161. ----, instrument for finding the true lunar distance, xxvi, 63.^f

_Meade, W._, mineral cabinet of, xxvi, 209. ----, on the coal near Tioga river, Penn., xiii, 32. ----, on the anthracites of Europe and America, xii, 75. ----, on the use of anthracite in the making of brick, xviii, 118. ----, mica for spectacle glasses, xviii, 374. ----, analogy of the minerals of northern Europe and N. America, xii, 303. ----, on the artificial preparation of medicinal waters, xxii, 126, 330. ----, on a now mineral spring near Albany, xiii, 145. ----, ibid, at Pittsburgh, xiv, 124. ----, analysis of Lebanon spring, xxxvi, 7. ----, idocrase in New England, vii, 50.

Meal from leguminous fruits, vii, 189.

_Mease, J._, on spontaneous combustion, xxxiii, 147, 199. ----, on bills of mortality, xli, 306. ----, on some of the vegetable materials from which cordage, twine and thread, are made, xxi, 27. ---- and _H. Perrine_, on the plants used for cordage, xxv, 330. ----, on descents in diving bells, xxii, 327.

Measure of a French metre compared with an English yard, xxi, 382.

Mécanique Céleste, translated by _N. Bowditch_, xix, 202; xxxv, 17.

Mechanics, analytic, a new general principle of, _Jacobi_, xliv, 170. ----, experiment in, xxii, 362. ----, review of _Allen's_, xvii, 338.

Meconic acid, _R. Hare_, xii, 293.

Meconine, remarks on, xxiii, 380.

Medals, remarks on, xxvii, 74. ---- and coins, _J. Allan_, xxxvii, 285. ---- ----, _J. W. Draper_ on, xxix, 157. ---- of New Haven, _J. Allan_, xxxvii, 285. ----, antique, found near Geneva, xx, 391. ---- founded by _De Lalande_, xxv, 190. ---- offered by the Royal Society of London, xxv, 412. Medal of the Royal Society of London, conferred on C. Lyell, xxx, 174. ----, Wollaston, conferred on L. Agassiz, xxx, 382. ----, Geographical Society, awarded to E. Robinson, xliii, 404. ----, Thomson's scientific, xviii, 198.

Medical electricity, _J. Hall_, iii, 168. ---- School of South Carolina organized, ix, 392.

Medina sandstone, freshwater fossils not occurring in, xlii, 230.

Medusa, fossil, _C. S. Rafinesque_, iii, 285.^f

Megalonyx, _R. Owen_, xliv, 342. ----, localities of, in the U. States, xxvii, 353; xlv, 209.

Megatherium, no bony armor to, xxxvii, 371. ----, remains of, in Indiana, _R. Haymond_, xlvi, 294. ----, of Georgia, xxvii, 353. ----, of New Jersey, _R. Harlan_, xiv, 187. ----, of Patagonia, xxxiii, 105.

Melam, _J. Liebig_, xxix, 372.

Melamine, xxix, 372.

Melanite of Franklin furnace, N. J., analysis of, _H. Seybert_,
viii, 300.

Mellon, _J. Liebig_, xxix, 371.

_Melloni, M._, investigations on heat, xxiii, 185; xl, 313. ----, on radiant heat and diathermancy, xxvii, 228.

Melville Island, rocks of, xvii, 10.

Memoir, see _Obituary_.

Memory, the process of, _I. Orr_, xxiii, 278. ----, loss of, from the use of gin, xxvi, 211.

Menardite, supposed new mineral, from Spain, xii, 385.

Mengite, xxvi, 388; xxxix, 249.

Mental aberration as connected with civilization, xxii, 379.

Mercapian, _Zeise_, xxix, 368.

Mercurial atmosphere, iii, 385.

Mercury, atomic weight of, xvi, 183; xlviii, 402. ----, amalgam of, _W. W. Mather_, xxvii, 263. ----, congelation of, vii, 192. ----, method of detecting small quantities of, vii, 392. ----, combination of, with metallic wires, xvii, 375. ----, elastic force of the vapor of, _M. Avogadro_, xxiv, 286. ----, on the vaporization of, in nitric ether, _S. Guthrie_, xxi, 90. ----, germination on, xix, 202. ----, passage of, from a vessel through a bar of lead bent like a syphon, xxxviii, 180. ----, iodide of, _W. W. Mather_, xxvii, 263. ----, compounds of, _Donovan_, ii, 350. ----, sesqui-sulphate of, xviii, 364. ---- mines of Spain, xxviii, 21. ---- ---- of Idria, xxix, 219.

Mercury, observations on the transit of, May, 1845, _D. Olmsted_,
xlix, 142.

Meridian, measurement of, v, 190. ----, length of a degree of, _T. J. Cram_, xxxi, 222.^f ----, formula for the establishment of a true, xxv, 261.^f

Merino sheep, v, 189.

Mermaid, ii, 178; vi, 195.

Mesotype in N. Hampshire, xviii, 133. ---- in New Jersey, v, 239; xl, 69.

Metagallic acid, _Pelouze_, xxviii, 126.

Metals, action of, on inflammable gases, xvii, 168. ----, apparatus for combustion of metals in chlorine, xiv, 354.^f ----, crystallization of, by galvanic influence, _G. Bird_, xxxiii, 267. ----, distribution of, according to their electric qualities, _J. P. Emmet_, xxv, 272. ----, electro-chemical reduction of, _Becquerel_, xxxi, 164. ----, electro-precipitated, structure of, xlix, 390. ----, letters on, permanent after fusion, xxv, 197. ----, reduction of, by azote, xix, 371. ----, singular modifications of the ordinary action of nitric acid on, xxxiii, 286. ----, solubility of, in persulphate and perchloride of iron, _J. Napier_, xlviii, 190. ----, new, aurum millium, ii, 363. ----, ----, didymium, xliii, 404. ----, ----, donium, xxxi, 163. ----, ----, erythronium, supposed new, xx, 386. ----, ----, lanthanium, xxxvii, 192. ----, ----, pelopium and niobium, xlviii, 400. ----, ----, ruthenium, xlviii, 401. ----, ----, selenium, i, 310. ----, ----, thorium, xvii, 381. ----, ----, vanadium, xx, 386. ----, sulphurets, new method of precipitating, xlvii, 193.

Metallic casting, vii, 190. ---- decompositions by phosphuretted hydrogen, xviii, 403. ---- salts, _C. Matteucci_ on the decomposition of, xx, 187. ---- vegetation, ii, 349. ---- wires and springs, on tempering, xx, 393.

Metalliferous veins, course of, and origin, _R. W. Fox_, xxxi, 373. ---- ----, electro-magnetic properties of, xx, 136.

Metamorphic changes at the Lipari Islands, xxxiii, 77. ---- agency, as indicated by certain crystals in some rocks in N. York, &c., _L. C. Beck_, xlv, 143; xlvi, 333. ---- changes in iron ore by trap dikes, in Nova Scotia, xv, 212. ---- ---- by artificial heat in a sandstone, _E. Emmons_, xlv, 146. ---- ---- by heat, through the medium of heated water, _J. D. Dana_, xlv. 104. ---- ----, by dikes, _J. D. Dana_, xlv, 113. ---- origin of granite, _R. H. Bonnycastle_, xxx, 245. ---- granite, _J. D. Dana_, xlv, 108. ---- limestone, Carrara marble an instance of, xxx, 176. ---- limestones, Maine, _C. T. Jackson_, xxxvi, 146. ---- rocks of N. Hampshire, notice of, _C. T. Jackson_, xlv, 145.

Metamorphism, related to pseudomorphism, xlviii, 92. ----, heated water an agency in, _B. Silliman_, xliii, 247.

Meteors, instances of some remarkable, _D. Olmsted_, xxvi, 133. ---- seen in Canada, April, 1840, xxxix, 383. ---- seen in Connecticut, Dec. 14, 1837, _E. C. Herrick_, xxxvii, 130. ---- ---- ----, at New Haven, March, 1813, _S. E. Dwight_, xiii, 35. ---- ---- ----, at New Haven, March 31 and April 1, 1826, _A. C. Twining_, xi, 184. ---- ---- ----, at New Haven, May, 1840, xxxix, 382. ---- ---- at Boston and N. Haven, in Nov., 1841, xliii, 399. ---- ---- in England, Nov. 26, 1758, xxxv, 231. ---- ---- ----, August 18, 1783, xxxv, 231. ---- ---- in Greece, xxxix, 381. ---- ---- in Illinois, in day time, Aug. 20, 1836, xxxiii, 402. ---- ---- in Maine, Aug. 7, 1823, vii, 170. ---- ---- in Massachusetts, near Boston, October, 1689, xliii, 399. ---- ---- in New Hampshire, at Rochester, 1837, xxxiii, 200. ---- ---- in New York, of a green color, Feb. 11, 1828, _B. D. Silliman_, xiv, 199. ---- ---- in North Carolina, at Fayetteville, xlix, 408. ---- ---- in Vermont, at Burlington, April 14, 1826, _G. W. Benedict_, xi, 120. ---- ---- in West Indies, at Antigua, xxxix, 381. ----, combustible, in Moscow, March, 1832, xxvi, 134. ----, gelatinous, account of, ii, 335. ----, ----, _E. Hitchcock_, xxv, 362. ----, ----, in 1718, in India, xxvi, 133. ----, ----, in 1796, in Lusatia, xxvi, 133. ----, called inflammable snow, _Hermann_, xxviii, 361. ----, mucilaginous, xlvii, 197. ----, theory of, _W. G. Reynolds_, i, 266. ----, see farther, _Shooting star_.

Meteoric iron, on chlorine in, _C. T. Jackson_, xxxiv, 332; xlviii, 145. ---- ----, ibid, _A. A. Hayes_, xlviii, 147. ---- ----, ibid, _C. U. Shepard_, xxxvi, 81; xl, 369; xliii, 359. ---- ---- in Africa, xxxvi, 213. ---- ---- in Europe, Bohemia, found in 1829, xix, 384. ---- ---- ----, in France, xxxiii, 257. ---- ---- ----, at Magdebourg, xxviii, 288. ---- ----, North American, in Alabama, Claiborne Co., analysis of, _C. T. Jackson_, xxxiv, 332. ---- ----, ----, ibid, _C. T. Jackson_ and _A. A. Hayes_, xlviii, 145. ---- ----, ----, in Alabama, xliii, 169. ---- ----, ----, in Alabama and Tennessee, _G. Troost_, xlix, 336.^f ---- ----, ----, in Connecticut, Canaan, (? _called_ native iron,) xii, 154. ---- ----, ----, ibid, analysis of, _C. U. Shepard_, xii, 155. ---- ----, ----, in Mexico, _Burkart_, xxviii, 288. ---- ----, ----, in N. York, near Oswego, _C. U. Shepard_, xl, 366.^f ---- ----, ----, ----, near Lockport, _B. Silliman, Jr._, xlviii, 388.^f ---- ----, ----, ----, at Burlington, _B. Silliman, Jr._, xlvi, 401. ---- ----, ----, in North Carolina, (_called_ native iron,) v, 262. ---- ----, ----, ----, _C. U. Shepard_, xvii, 140. ---- ----, ----, ----, Buncombe Co., _C. U. Shepard_, xxxvi, 81; xliii, 359. ---- ----, ----, ----, Guilford Co., _C. U. Shepard_, xl, 369. ---- ----, ----, in Tennessee, description and analysis of, _G. Troost_, xxxviii, 250. ---- ----, ----, ibid, analysis of, _C. U. Shepard_, xliii, 354. ---- ----, ----, in Tennessee, _G. Troost_, xlix, 336.^f ---- ----, ----, of Texas, account of, viii, 218; xxxiii, 257. ---- ----, ----, ----, analysis of, _C. U. Shepard_, xvi, 217. ---- ----, ----, ----, a mass, presented to Yale College, xxvii, 382. ---- ----, ----, in Virginia, xliii, 169. ---- ----, South American, near Bogota, ix, 194. ---- ----, see farther under _Meteorite_. ---- phenomena, _Adie's_ mode of registering, xxviii, 70. ---- rain in Hungary, terrestrial origin of, xliii, 401. ---- shower of grain, xli, 40. ---- ---- of fish, xli, 40.

Meteorites, on the nature and origin of, _J. Berzelius_, xxxvii, 93. ----, ---- ibid, _J. L. Ideler_, xxviii, 288. ----, ---- ibid, _Fleurian de Bellevue_, v, 170. ----, African, Cold Bokkeveld, notice of, xxxvi, 393; xl, 199. ----, ----, ibid, analysis of, xxxvii, 190. ----, in Asia, Hindoostan, 1834, xxx, 175. ----, in Europe, France, in the Commune of Juvenas, 1821, v, 175. ----, ----, ----, ibid, analysis of, vi, 397. ----, ----, ----, in the Dept. of Loiret, 1841, xlii, 203. ----, ----, ----, of Chateau-Renard, characters and analysis of, xlii, 403. ----, ----, ----, near Bethune, xlii, 203. ----, ----, in Moravia, 1833, xxx, 175. ----, ----, in Silesia, at Grüneberg, xlii, 203. ----, in _North America_, ----, ----, Connecticut, at Weston, analysis of, i, 273. ----, ----, ----, ibid, some considerations on its velocity, course, &c., _E. C. Herrick_, xxxvii, 132. ----, ----, Georgia, May, 1829, notice of the fall of, xviii, 388. ----, ----, ----, May, 1829, description of, xviii, 389. ----, ----, Maine, August, 1823, analysis of, ix, 400. ----, ----, Maryland, February, 1825, notice of, _S. D. Carver_, ix, 351. ----, ----, ----, ibid, analysis of, _G. Chilton_, x, 131. ----, ----, ----, ibid, description of, x, 135. ----, ----, Massachusetts, East Bridgewater, May 5, 1837, xxxii, 395. ----, ----, Missouri, February, 1839, _E. C. Herrick_, xxxvii, 385. ----, ----, Tennessee, fall of, at Nashville, xv, 358; xviii, 378. ----, ----, ----, 1827, analysis of, xvii, 326. ----, ----, ----, ibid, general characters of, xviii, 200. ----, ----, Virginia, Richmond, June 4, 1828, xv, 195. ----, ----, ----, ibid, description and analysis of, _C. U. Shepard_, xvi, 191. ----, ----, ----, apatite in, _C. U. Shepard_, xlv, 102. ----, ----, ----, Grayson Co., xliii, 169. ----, in South America, Brazil, xxxiv, 209. ----, Sandwich Islands, xlix, 407.

Meteorological correspondence of _Morin_, xxvii, 172. ---- facts and phenomena, review of various, _W. C. Redfield_, xxv, 122; xxxiii, 50. ---- memoranda, ancient, xlii, 399. ---- observations, rules for making, _C. Dewey_, xi, 59. ---- ----, mode of making at the Albany Institute, &c., xxx, 194. ---- ----, balloons a means of making, _D. Brewster_, xlii, 150. ---- ---- made at the equinoxes and solstices, report on the reduction of, before the British Association, 1840, xl, 311. ---- ---- ibid, report of progress, xlii, 149. ---- ----, on the progress of the great coöperative system of, _J. F. W. Herschel_, xliii, 372. ---- ----, in Asia, at Canton, _W. C. Redfield_, xxxviii, 267, 272. ---- ----, ----, at Singapore, 1839-1841, _J. S. Travelli_, xliv, 151. ---- ----, ----, at Trevandrum, hourly, notice of, xl, 322. ---- ----, ----, in the Ghâts of Western India, xxxviii, 103. ---- ----, in England, at Plymouth, hourly, notice of a report on, xlii, 149; xliii, 369. ---- ----, ----, hourly, at Inverness and Kingussie, some deductions from, _D. Brewster_, xxxviii, 95; xl, 321. ---- ----, ----, hourly, at Inverness and Unst, in progress, xlii, 150. ---- ----, North American, in Canada, at Montreal, _J. S. McCord_, for 1836, xxxiv, 208. ---- ----, ----, ibid, for 1837, xxxv, 382. ---- ----, ----, ibid, for 1838, xxxvi, 180.

Meteorological observations, North American, in Canada, at Montreal, _J. S. McCord_, for 1836-1840, xli, 330. ---- ----, ----, at Newfoundland, _W. C. Redfield_, xxxviii, 265, 269. ---- ----, ----, New England, ancient, xliii, 398. ---- ----, ----, in Connecticut, at New Haven, 1766, 1767, xxviii, 183. ---- ----, ----, ibid, for 1827, _D. Olmsted_, xiv, 176. ---- ----, ----, ibid, for 1828, _D. Olmsted_, xvi, 70. ---- ----, ----, in Cuba, at San Fernando, _J. H. Blake_, xlii, 292. ---- ----, ----, in Cuba, at Matanzas, 1832-33, _A. Mallory_, xxvi, 89; 1835, xxxi, 287. ---- ----, ----, in U. States, at different military posts, by surgeons of the army, xii, 149. ---- ----, ----, in New England, in the years 1741 to 1757, _J. Winthrop_, xl, 204. ---- ----, ----, in Florida, 1833, _H. B. Croom_, xxv, 69. ---- ----, ----, in Georgia, 1832-33, _W. H. Williams_, xxv, 211. ---- ----, ----, ----, 1833-34, xxvii, 173. ---- ----, ----, in Indiana, _D. D. Owen_, xxix, 294. ---- ----, ----, in Louisiana, at New Orleans, 1833-1836, _Barton_, xxxi, 400. ---- ----, ----, ----, at Jackson, 1839-1841, _W. M. Carpenter_, xliv, 49. ---- ----, ----, in Michigan, at Sault de St. Marie, _L. Foot_, ix, 171. ---- ----, ----, in Missouri, at St. Louis, xxxii, 386. ---- ----, ----, in Massachusetts, at Deerfield, _E. Hitchcock_, iv, 333. ---- ----, ----, ----, at Westfield, 1825, xii, 119. ---- ----, ----, ----, at Boston, 1820-29, xx, 264. ---- ----, ----, ----, at New Bedford, 1830, xx, 162; 1831, xxii, 188. ---- ----, ----, in New Hampshire, at Dartmouth College, xxviii, 179. ---- ----, ----, in New York, 1833-34, _W. C. Redfield_, xxviii, 154. ---- ----, ----, ----, in N. Y. city, 1838 and 1839, with the mean results for the last seven years, _W. C. Redfield_, xxxviii, 323. ---- ----, ----, ----, for May, 1834, at Cazenovia, _J. Johnston_, (therm., winds, weather,) xxvi, 398. ---- ----, ----, ----, at Brooklyn, for 1829, xvii, 409. ---- ----, ----, ----, at Penn Yan, 1834, _H. P. Sartwell_, xxviii, 187. ---- ----, ----, New Jersey, at Middletown, _J. F. Jenkins_, 1831, 1832, xxii, 394; 1832-34, xxvi, 395. ---- ----, ----, in North Carolina, at Chapel Hill, _D. Olmsted_, x, 294. ---- ----, ----, in Ohio, kept at Marietta, _S. P. Hildreth_, 1826, xii, 213. ---- ----, ----, ----, ibid, 1827, xiv, 63. ---- ----, ----, ----, ibid, 1828, xvi, 44. ---- ----, ----, ----, ibid, 1829, xviii, 368. ---- ----, ----, ----, ibid, 1830, xx, 126. ---- ----, ----, ----, ibid, 1831, xxii, 109. ---- ----, ----, ----, ibid, 1832, xxiv, 132. ---- ----, ----, ----, ibid, 1833, xxvi, 84. ---- ----, ----, ----, ibid, 1834, xxviii, 160. ---- ----, ----, ----, ibid, 1835, xxx, 56. ---- ----, ----, ----, ibid, 1836, xxxii, 95. ---- ----, ----, ----, ibid, 1837, xxxiv, 132. ---- ----, ----, ----, ibid, 1838, xxxvi, 78. ---- ----, ----, ----, ibid, 1839, xxxviii, 273. ---- ----, ----, ----, ibid, 1840, xl, 345. ---- ----, ----, ----, ibid, 1841, xlii, 344. ---- ----, ----, ----, ibid, 1842, xliv, 347. ---- ----, ----, ----, ibid, 1843, xlvi, 277. ---- ----, ----, ----, ibid, 1844, xlviii, 287. ---- ----, ----, ----, at Western Reserve College, Sept.-Nov., 1838, _E. Loomis_, xxxvi, 166. ---- ----, ----, ----, at Hudson, for the years 1838, 1839, 1840, _E. Loomis_, xli, 310. ---- ----, ----, ----, ibid, 1841-1844, xlix, 266. ---- ----, ----, ----, at Steubenville, 1844, _R. Marsh_, xlix, 212. ---- ----, ----, in Oregon, or west of the Rocky Mountains, _A. Eaton_, from _J. Ball_, xxv, 351. ---- ----, ----, ----, at Fort Vancouver, _J. Ball_, 1832, '33, xxviii, 9. ---- ----, ----, in Vermont, Fayetteville, _M. Field_, xii, 364; xvi, 288; xviii, 366; xx, 261^f; xxii, 298; xxiv, 361. ---- ----, ----, in Wisconsin, at Fort Winnebago, xxx, 13. ---- ----, South American, in Colombia, 1820, 1830, _R. Wright_, xxxvii, 1. ---- ----, ----, at Rio Janeiro, _J. Gardner_, xlvii, 290. ---- ----, at sea, on a voyage from Liverpool to New York, v, 137. ---- ----, ----, on board the United States ship Peacock, _W. S. W. Ruschenberger_, xxxiii, 345. ---- ----, ----, on board the United States ship Erie, 1834, between New York and Rio Janeiro, xxix, 237. ---- ----, (electro-) _J. Swaim_, xxxii, 304.^f ---- ----, see farther, _Floral calendar_. ----, tables, _J. de Wallestein_, ix, 394.

Meteorology, _J. D. Forbes_ on the progress of, xl, 318.

Metre, French, compared with an English yard, xxi, 382.

Mexican Andes, ascent of Popocatepetl, xxviii, 220.

Mexico, geological character, climate, uses of obsidian, &c. in, xvi, 160. ----, geological remarks relating to, _W. Maclure_, xx, 406. ----, discovery of mummies near Durango, xxxvi, 200. ----, silver mines of, xxiv, 226. ----, meteoric iron at Charcas, xxviii, 288.

Mica, containing potash and lithia, xxxvii, 356. ----, analyses of lepidolite and a yellow, xxxvii, 361. ----, of Chester, Mass., crystallization of, viii, 250.^f ----, use of, in chemical analyses, xxiv, 373. ----, black, a substitute for glass in spectacles, xviii, 374. ----, models of crystals made of, xxxviii, 187. ----, in Canada, viii, 67. ----, in Connecticut, i, 353;--plumose, vi, 251. ----, in Massachusetts, i, 113; ii, 237; iv, 55 (green); vii, 255; viii, 41, 235;--prismatic, v, 399; vii, 30, 255; viii, 41; xiv, 219; --rose, i, 350; v, 265. ----, in New Hampshire, v, 40; xvii, 357. ----, in New Jersey, v, 246; vi, 250. ----, in New York, iv, 37; v, 29; ix, 40, 251; xxi, 326. ----, in Pennsylvania, ix, 45; xiv, 5, 13. ----, in Virginia, v, 257. ----, slate, association with granite, in Massachusetts, and relative age, vi, 4. ----, ----, varieties in the Connecticut valley, vi, 22. ----, ----, minerals of, vi, 24. ----, ----, in western Massachusetts, viii, 6, 240. ----, ----, relation to gneiss, viii, 6. ----, ----, conglomerated, in Windsor, Mass., viii, 7. ----, ----, contorted, viii, 253. ----, ----, minerals of, viii, 7. ----, ----, alternations with granular limestone, ii, 211; viii, 15, 240, 252. ----, ----, containing rounded pebbles of quartz, in Massachusetts, viii, 244.

Mice, habits of, xlvi, 242.

_Michaux, André_, notice of, _A. Gray_, xlii, 2. ----, notice of his botanical labors, ix, 266. ----, the younger, notice of, xlii, 10.

Michigan, notice of the peninsula of, in relation to its topography, scenery, agriculture, population, resources and productions, _J. Pierce_, x, 304. ----, Indians of, _J. Pierce_, x, 313. ----, rocks of, xl, 136. ----, mining region of, _D. Houghton_, xli, 183. ----, Geological Reports on, of _D. Houghton_, noticed, xxxiv, 190; xl, 136. ----, geological and mineralogical observations on the northwest portion of Lake Huron; _J. I. Bigsby_, iii, 254.^f ----, geological and mineralogical observations of the region about Fort Winnebago, _D. Ruggles_, xxx, 1.^f ----, native copper and ores of, _D. Houghton_, xli, 185; xlv, 331, 332. ----, ---- ---- ibid, _D. Ruggles_, xlix, 64.^f ----, ---- ----, of Lake Superior, _H. R. Schoolcraft_, iii, 201.^f ----, ---- ---- and silver, of Kewenaw Point, _C. T. Jackson_, xlix, 81. ----, Lake, height of, xlv, 16; xlvi, 259, 260.

Microlite, _C. U. Shepard_, xxvii, 361; xxxii, 338; xliii, 116; xlviii, 176. ----, identical with pyrochlore, _J. E. Teschemacher_ and _A. A. Hayes_, xliii, 33. ----, reply to, ibid, by _C. U. Shepard_, xliii, 116; xlviii, 176. ----, analysis of, _A. A. Hayes_, xlvi, 158.

Micrometers, artificial spider's web for, xv, 183.

Microscope, on improvements in, _E. Thomas_, xix, 57.^f ----, on the achromatic, _E. Thomas_, xx, 265.^f ----, monochromatic lamp of _D. Brewster_ for, vii, 363. ---- and microscopical observations, notice of, xli, 205.

Microscopic life, see _Infusoria_, and _Zoology_.

Migration of birds, note on, x, 192. ---- ----, of North America, _J. Bachman_, xxx, 81.

Mildew, prevention of, iii, 385.

Milk, mode of preserving indefinitely, xviii, 152. ----, use of, in dropsy, xxiv, 209. ----, facts from _Barruel_ respecting the milk sold in Paris, xvii, 378.

Milk tree of Venezuela, xix, 373.

Milking, principle of the balance applied to, _H. Strait_, xxvii, 92.^f

Milkweed, Asclepias Syriaca, a substitute for flax, xxvii, 384. ----, on the fibre of, xxviii, 380.

_Miller, E._, canals of Pennsylvania, xxv, 84; xxvi, 108. ----, on tracing oval arches, xxii, 303.^f

Millet's smoke disperser, xvii, 164.

Milo, catacombs of, xvi, 331.^f ----, caves of, containing alum, xvi, 334.

Mines, depth of different, xxix, 374. ----, wire ropes for deep, xxxv, 319. ----, general remarks on the positions of, _Taylor_, xxxiv, 9. ---- of Pasco, S. A., xvii, 43.^f ---- of the Hartz, and mode of working, xix, 113. ---- of Idria, xxix, 219. ---- of Michigan, position of, _D. Houghton_, xli, 183. ---- of Russia, see under _Russia_. ---- of Spain, xxviii, 17, 21, 144. ---- of Tokat, xxxvii, 352. ----, see farther, under names of _Countries_, _Metals_ and _Minerals_.