Chapter I: TOBACCO CULTIVATION UNDER CLOTH, PORTO RICO Page 50

II. DRAWINGS OF SOLAR CORONA " 96
III. CHINESE BOWL, SHOWING CRACKLE " 107
IV. MUD CRACKS ON SHORE OF ROGER'S LAKE, ARIZONA " 108
V. NATURAL LINES, CRACKS, FISSURES, ETC. " 112
VI. ARTIFICIAL LINES, RAILWAYS, STREETS, CANALS, ETC. " 113
VII. DOME OF LOWELL OBSERVATORY, FLAGSTAFF, ARIZONA " 158
VIII. TWENTY-FOUR INCH TELESCOPE, LOWELL OBSERVATORY " 160
IX. DRAWINGS OF CANALS OF MARS BY THE AUTHOR " 162

PORTRAITS

GIOVANNI VIRGINIO SCHIAPARELLI _Page_ 172
PERCIVAL LOWELL " 174
HENRI PERROTIN " 176
M. THOLLON " 178

_Life not wholly unlike that on the earth may therefore exist
upon Mars for anything we know to the contrary._

SIMON NEWCOMB.

MARS AND ITS MYSTERY