Chapter XXI: Part III: , =Practical X Ray Work=--Chapters I., Installations.--II.,

Radioscopy.--III., Radiography.--IV., X Rays in Dentistry.--V., X Rays in Chemistry.--VI., X Rays in War.--Index.

=List of Plates.=

_Frontispiece_--Congenital Dislocation of Hip-Joint.--I., Needle in Finger.--II., Needle in Foot.--III., Revolver Bullet in Calf and Leg.--IV., A Method of Localisation.--V., Stellate Fracture of Patella showing shadow of "Strapping".--VI., Sarcoma.--VII., Six-weeks'-old Injury to Elbow showing new Growth of Bone.--VIII., Old Fracture of Tibia and Fibula badly set.--IX., Heart Shadow.--X., Fractured Femur showing Grain of Splint.--XI., Barrell's Method of Localisation.

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=DRYING BY MEANS OF AIR AND STEAM.= Explanations, Formulæ, and Tables for Use in Practice. Translated from the German of E. HAUSBRAND. Two Diagrams and Thirteen Tables. Demy 8vo. 1901. 72 pp. Price 5s.; India and Colonies, 5s. 6d.; Other Countries, 6s.; strictly net.

=Contents.=

Preface.--British and Metric Systems Compared--Centigrade and Fahr. Thermometers.--Chapters I, Introduction.--II., Estimation of the Maximum Weight of Saturated Aqueous Vapour which can be contained in 1 kilo. of Air at Different Pressure and Temperatures.--III., Calculation of the Necessary Weight and Volume of Air, and of the Least Expenditure of Heat, per Drying Apparatus with Heated Air, at the Atmospheric Pressure: _A_, With the Assumption that the Air is _Completely Saturated_ with Vapour both before Entry and after Exit from the Apparatus.--_B_, When the Atmospheric Air is Completely Saturated _before entry_, but at its _exit_ is _only_ 3/4, 1/2 or 1/4 Saturated.--_C_, When the Atmospheric Air is _not_ Saturated with Moisture before Entering the Drying Apparatus.--IV., Drying Apparatus, in which, in the Drying Chamber, a Pressure is Artificially Created, Higher or Lower than that of the Atmosphere.--V., Drying by Means of Superheated Steam, without Air.--VI., Heating Surface, Velocity of the Air Current, Dimensions of the Drying Room, Surface of the Drying Material, Losses of Heat.--Index.

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=Leather Trades.=

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=THE LEATHER WORKER'S MANUAL.= Being a Compendium of Practical Recipes and Working Formulæ for Curriers, Bootmakers, Leather Dressers, Blacking Manufacturers, Saddlers, Fancy Leather Workers, and all Persons engaged in the Manipulation of Leather. By H.C. STANDAGE. 165 pp. 1900. Price 7s. 6d.; India and Colonies, 8s.; Other Countries, 8s. 6d.; strictly net.

=Contents.=

Chapters I., Blackings, Polishes, Glosses, Dressings, Renovators, etc., for Boot and Shoe Leather.--II., Harness Blackings, Dressings, Greases, Compositions, Soaps, and Boot-top Powders and Liquids, etc., etc.--III., Leather Grinders' Sundries.--IV., Currier's Seasonings, Blacking Compounds, Dressings, Finishes, Glosses, etc.--V., Dyes and Stains for Leather.--VI., Miscellaneous Information.--VII., Chrome Tannage.--Index.

=Press Opinions.=

"The book being absolutely unique, is likely to be of exceptional
value to all whom it concerns, as it meets a long-felt
want."--_Birmingham Gazette._

"This is a valuable collection of practical receipts and working
formulæ for the use of those engaged in the manipulation of
leather. We have no hesitation in recommending it as one of the
best books of its kind, an opinion which will be endorsed by those
to whom it appeals."--_Liverpool Mercury._

"We think we may venture to state, so far as the opinion of the
leather trade under the Southern Cross is concerned, that it will
be one of approval. As practical men, having a long and wide
experience of the leather trade in Australia, we are certain that
there are many tanners and curriers carrying on business in remote
townships of the colonies to whom such a manual of practical
recipes will be invaluable.... This manual is not a mere collection
of recipes for the various purposes to which they may be applied,
but it is also replete with instructions concerning the nature of
the materials recommended to be used in making up the recipes....
We think every intelligent leather man should avail himself of the
manual. It is undoubtedly a valuable contribution to the technology
of the leather trade."--_Australian Leather Journal and Boot and
Shoe Recorder._

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=PRACTICAL TREATISE ON THE LEATHER INDUSTRY.= By A.M. VILLON. A Translation of Villon's "Traité Pratique de la Fabrication des cuirs et du Travail des Peaux". By FRANK T. ADDYMAN, B.SC. (Lond.), F.I.C., F.C.S.; and Corrected by an Eminent Member of the Trade. 500 pp., royal 8vo. 1901. 123 Illustrations. Price 21s.; India and Colonies, 22s.; Other Countries, 23s. 6d.; strictly net.

=Contents.=

Preface--Translator's Preface--List of Illustrations.

Part I., =Materials used in Tanning=--Chapter I., Skins: I., Skin and its Structure; II., Skins used in Tanning; III., Various Skins and their Uses--Chapter II., Tannin and Tanning Substances: I., Tannin; II., Barks (Oak); III., Barks other than Oak; IV., Tanning Woods; V., Tannin-bearing Leaves; VI., Excrescences; VII., Tan-bearing Fruits; VIII., Tan-bearing Roots and Bulbs; IX., Tanning Juices: X., Tanning Substances used in Various Countries; XI., Tannin Extracts; XII., Estimation of Tannin and Tannin Principles.