INDEX. 
Shale in northern Texas, i., 15-19 
Shales indurated, at Bergen -Hill, 
A ETIPe 
Shark, photograph of, vi., 70 
Sharks, Carboniferous, armor of, iii., 
54 
notes on ancestral, xv., 40 
Shawangunk grit, v., 216 
Range, N. Y., glaciation of, iii., 
22-30 
Shell heaps, ii., 141-143 
implements, i., 121, 147 
Shell-mounds of Florida, viii., 164, 
165 
Shells, evolution in, vii., 114, 115 
land, ii., 150 
land, distribution in West Indies, 
ii., 151-154 
Ship-canal at Nicaragua, viii., 165, 
168, 169, 170 
at Panama, vili., 165, 168, 169, 170 
Ship-railroad at Tehuantepec, viii., 
164-174 
Ship-worms, ravages of, viii., 169 
Shumardia granulosa, vii., 2 
Sicydium Lindheimeri, vii., 9 
Sida, vili., 77 
diffusa, vii., 8 
physocalyx, vii., 8 
Siderite, viii., 2 
Sierra Nevada, glaciation in, ii., 155 
Sigillaria, i1., 50 ;1v., 75, 76 
Signals, railway, v., 149 
Significance of flora to Iroquois, v., 
202 
Siliceous sponge from L. I., v., 120 
sinter from Yellowstone, iii., 6, 7 
Silicified forest in Arizona, v., 9-11 
wood from California, viii., 29, 30 
from New Mexico, viii., 77 
wood in Colorado, iii., 6, 7 
woods, vi., 165, 166 
Silurian, lower strata, v., 216, 220 
Silver, i1., 94, 95 ; vi., 60, 64 
action on ozone, v., 185 
in pyrites, v., 192 
ores and mines, in Col., v., 122- 
130 
castings from Peru, ili., 15, 62, 63 
chloride, iii., 1 
native, ili., 2, 38 
ores, processes for amalgamation, 
zt a be 
sulphide, iii., 19 
Ba) 
experiments upon, xiy., 180 
in Lake Copper, i., 4 
** King ’’ mine, vi., 85 
native, vili., 11, 160 
native from Sweden, ix., 150 
minerals from Potosi, S. A.,ix., 154 
remarkable nugget, xv., 185 
Silver, Louis Mann, elected resident 
member, xv., 147 
Sinai, desert of, ix., 110 
Singing beach at Eigg, ix., 23 
beach of Manchester, ii., 147, 148 
beaches of the Baltic, iii., 97, 98 
in Scotland and America, ili., 72- 
76 
Siphonoglossa pilosella, vii., 12 
Sirius, v., 184 
Sisymbrium pinnatum, vii., 7 
canescens, Vil., 7 
Skeletons found at Far Rockaway, 
ii., 140-144 
paleolithic, viii., 132-135 
Sketch Map of Cambrian at Hanford 
Brook, xiv., 108 
Skulls deformed by pressure, viii., 4, 
5, 6, 116 
paleeolithie, viii., 134, 135 
Skunnemunk mountain, geology of, 
My, oe 
Sky Line Mine, x., 63 
Skytop, N. Y., glacial striation upon, 
lii., 28 
Slate, i., 21, 22; ii., 72, 149, 150 
black, in San Juan Mts., v., 123, 
129 ! 
near Nat. Bridge, v., 218 
Smilacina sessilifolia, vili., 79 
Smith, E. E., elected resident mem- 
ber, xiii., 151 
Francis P., elected resident mem- 
ber, xii., 25 
irs sibs PACs vas lol 
Nelson, elected resident member, 
XI oo 
Smoke, darkening the atmosphere, 
iii., 60, 61 
Smoky quartz, viii., 161 
Snake river, Idaho, i., 4, 5 
Snow peaks of Oregon, iii., 77 
Soapstone at Norwich, Ct., ii., 18 
Societies, vi., 167-182 
etc., receiving publications of 
Academy, iii, 138-149; xii. at 
end of vol. 
