314 
Deweylite, iii., 17 
Diabantite, viii., 17 
Diabase, i., 21; xiv., 201, 213 
dikes in Thousand Islands, xiii., 
213 
Diagonal trends of the earth’s crust, 
1X, GLO 
Diamond cutting and polishing, ix., 
146 
washing, ix., 147 
from Butte county, Colo., 
from North Carolina, vi., 39 
from Georgia, vii., 166, 251 
great orange, vii., 49 
Koh-i-nor, vii., 49 
origin of, vil., 236 
North American, viii., 
x., 49 
from Wisconsin, xiii., 145 
crystals of, iii., 21, 72, 105, 107 
illustration of hardness of, iv., 59 
Dianthera parvifolia, ix., 181 
Diatomacere, vi., 50 
Diatomaceous earth, xii., 217 
Adirondacks, xiii., 97 
New Jersey, vili., 16 
Diatomez, ix., 33 
Diatome structure, xiv., 71 
Diatoms, x., 119 
in Beaver Pond, xiii., 188 
in clays of New York State, xiii., 
165 
Dichoplectella, xiv., 112 
Dickerson, E. N., elected resident 
member, Xiv., "220 
Dicksonia, v., 136 
Dicorea Brandegei, viii., 77 
Dietyonema flabelliforme, 
Xiv., 272 
Dietyopyge macrura, vi., 127 
Dicynodont reptile, v., 20 
Didelphys, xii., 187 
Didymium, v., 185; vii., 220, 236 
Diffraction of sound, viii., 130, 131 
theory of corona, v., 246 
Dikes in Essex county, New York, 
Xill., 229 
Dimorphous foliage of Sphenophyl- 
lum, ili., 46 
Di 3 (new element), v., 200 
Dinichthys, ii., 147; iii., 20; v., 25-28; 
vi., 164, 165; xii., 187 
corrugatus, v., 26 
Curtus, vii., 179 
TN isn sat 
159, 160 
Eichwald, 
) 
INDEX. 
Gouldii, v., 26 
Hertzeri, v., 26 
minor, V., 26 
Terrelli, v., 265 vii:, 1'79 
tuberculatus, vii., 179 
Dinichthys, vertebral column, fins 
and ventral armoring of, xv., 
157 
anterior ventrals, xv., 159 
posterior ventrals, xv., 159 
Notochordal area and vertebral 
arches, xv., 161 
supporting elements of the dorsal 
and pelvic fin, xv., 162 
Dinichthide, v., 28 
Dinocerata, iv., 20 
Dinosaurs in Brussells museum, viii., 
11 
Dinosaur skeleton in Connecticut, 
Vie li 
Dinotherium, iy. 
Dinwiddie, Mr. 
viii., 2 
Diodontidz in American seas, v., 89 
Dionza, xii., 9 
Diodmites longifolius, vi., 126 
Diopside, vili., 162 
from DeKalb, New York, i., 136 
Dioptric and diffractive images, i1., 
83 
Diorite from Colorado, vii., 16 
in Syria, vil., 168, 174 
porphyrite, xiv., 210 
orbicular, ix., 145 
Dioryte, i., 21, 49 ; 
Diospyros, v., 136 
Diospyros primexva, xiii., 181 
Steenstrupi, Xii., 34 
Diplachne dubia, ix. , 182 
Dipleurus, v., 18 
Diplognathus, ii., 147 
Diplognathus mirabilis, v., 27, 28 
Diplograptus foliaceus, vii., 3 
Ingosus, vii., 3 
Diplotheca Hyattiana xiv., 130 
Diplurus, fin structures of, xiii., 22 
longicaudatus, vi., 127 
Diphenylamine-acrolein, i., 127-128 
Diptera, v., 45 
Dipterus, ii., 146; vi., 127 
Dipterusvalenciennesi, xiii., 131 
Discogloseus xii., 245 
Discharges, vacuum, xi., 72, 124 
Discoveries by Priestley, vii., 198 
, 20, 22 
’ Robert, death of, 
ii., 94-95, 149 
