INDEX. 
Electrical resistance, range and accu- 
racy in measurement of, xiv., 65 
Electricity, dynamic, v., 89-110 
upon comets, v., 255 
applications of, x., 116 
Electrolysis, v., 186, 187 
literature of, i., 163 
Elementary substances, v., 181, 183, 
200, 244 
discovery of, v., 181, 183 
Elephant, African, i., 153 
Elephas, iv., 20, 22, 25 
Elephas Americanus, vi., 59 
Antiquus, vili., 135 
Indicus, anatomy of kidney of, 
xiii , 110 
Elephants, ancient and modern, iv., 
19 
small, from Farther India, iv., 19 
Elephant’s tooth, iv., 59 
Elevation of Champlain deposits, 
ili., 95 
‘* Elgin sandstones,’’ v., 20 
Elizabethtown, N. Y., Pleistocene 
Lake bed at, xili., 107 
Ellenville, N. Y., quartz crystals 
from, xili., 181 
Elliot, Mr. 8. Lowell, death of, viii., 
128 
Elllipsocephalus galeatus grandis, xiv., 
139, 140 
Elves of the air, xi., 123 
Emargination of wing feathers, vii., 
19-21, 75-78, 80-87, 89-100 
Embryonic Baculites from the Black 
Hills, xiv., 63 
Embryology of Amblystoma, vii., 255 
newer problems of, xiv., 76 
Emerald from North Carolina, ii., 3 
Emeralds in North Carolina, i., 101— 
105 
in North Carolina, viii., 2, 160 
of North Carolina, iii., 95 
vii., 212, 224, 250 
Encelia calva, vii., 11 
subaristata, vii., 11 
Enclosure of spinel in ruby, iii., 21 
Energy of sun, v., 240 
Engelmannia pinnatifida, vii., 11 
Engineer’s club of Philadelphia, vii., 
72 
Engis skull, viii., 135 
Efagonum, i., 8 
Enstatite, viii., 49 
317 
Eocene limestone near Green river, 
1, 13 
of Syria, vii., 168 
Eozoon, ii., 1 
Ephedra, iii., 47 
antisyphilitica, 1x., 182 
Epidendrum tampense (new), ix., 13 
venosum, ix., 13 
Epilobium paniculatum, viii., 80 
Epidote, ii., 25, 150 
at Cranberry mine, v., 221 
with chalcopyrite, v., 121 
Vil., 6, 49, 57, 63, 213, 219, 223, 226 
viii., 45, 50, 53, 54 
Epidosyte, vii., 57 
Epithemia, xiii., 101 
Epsomite, viii., 22 
Equisetum laticostatum, v., 17 
Equisetum Rogersi, vi., 126 
Eragrostio Minor, ix., 182 
oxylepis, ix., 182, 185 
Erasure of names, vil., 193 
Erax multicaulis, vii., 11 
Erbium, vii., 220 
Erection of building-stone on edge, 
li., 122 
Eremacausis, v., 118 
Eremophila Alpestris, ix., 129 
Erigeron tenuis, vii., 10 
flagellaris, viil., 79 
glabellus, vili., 78 
Eriochloa sericea, ix., 182 
Eriogonum, vili., 77, 81 
Abertianumn, viii., 77 
annuum, vill., 77 
cernuum, viil., 77, 80 
deflecum, viil., 81 
flavum, viii., 81 
Mearnsii, viii., 72 
microthecum, viii., 81 
racemosum, Vili., 77 
trichopodum, viii., 77 
vimineum, Vill., 77 
Wrightii, viil., 77 
Eritrichium Jamesii, viii., 80 
glomeratum, viii., 80 
setosissimum, vViil., 80 
Eroding power of ice, viii., 164 
Erodium Texanum, vii., 8 
Evolvulus sericeus, vii., 12 
Erosion in Catskill mts., i., 24-31 
in valley near Charmouth, Eng., 
1., 2/—28 
of limestone, i., 60, 65 
