296 
Actinolite, iii., 13, 49 ; v., 264 ; vii. 
213, 224 ; viil., 59 
Actinophorus Clarkii, vii., 179 
Actinopterigium, xii., 121 
Activity of Cretaceous teliosts, iii., 54 
Adaptation of shells of Crepidula, 
3a OL 
Adjournment of the Academy,ix.,212 
Adipocere, vili., 27 
Adirondack forests, destruction of, 
lii., 35-37 
Adirondack park, x., 111 
Adirondacks, schistose rocks in, iv., 
72 
geology of, xii., 19 
diatomaceous earth in, xili., 98 
Pre-Cambrian topography of, xv., 
184 
Adularia, vii., 229 
Adze, votive, vi., 139 
JHolian rock, x., 7 
Aération of water, vi., 47-52 
Aérial navigation, vil , 83 
Aérolites, Winnebago Co., ix., 201 
Aéronautics, development of, xii.,113 
/Hther (assumed element) v., 184, 
185 
Afghanistan, sonorous sandhills, iii., 
99 
Affiliated Scientific Societies, 
Informal reports, xv., 1 
Affinity, chemical, v., 185, 187 
Agaricus Americanus, v., 111 
mellus, v., 111 
Agassiz Association, viil., 46 
Aggassizia suavis, vii., 11 
Agate, iii., 34, 62 ; viii., 161, 162 
cutting, v., 19 
from Mexico, ii., 117 ; vii., 222 
Agathaumas sylvestre, ix., 28 
Agatized woods from Arizona, v., 9- 
11 ; vi., 165, 166 
Agave, i1., 92 
heterocantha, 94 
Mexicana, ix., 182 
Agencies in decay of stone, ii., 74 
Age of Green Pond rocks, vi., 59 
of New York Island, vii., 59, 60 
of Westchester county limestones, 
vii., 16 
Age, Stone, x., 109 
Aglossa, vii., 256 
A graulos strenuus, horizon of, xiv.,102 
Agropyrum Scribneri, viii., 79 
INDEX. 
Agnostis verticillata, viii., 77 
Aguilera, José G, elected corre- 
sponding member, xi., 25 
Air, boiling point of, v., 191 
Air Brakes, v., 149, 150 
Air, elves of the, xi., 123 
Air-wave, volcanic, xiii., 83 
Alaska, Boulder of rock crystal, iii., 
81 
large oak-leaves, 95 
(title) xi., 77 
Alauda Alpestris, ix., 129 
Albertite, xiii., 26, 27 
Albite, ii.,:42, 119; vi., 130 -eyue 
221, 228, 229; viil., 54 
from Diabase of Staten Island, iv., 
76 
in New York Island, iv, 75, 227 
in Staten Island, iv., 230 
Albumenoids, x., 24 
Alchemical symbols, ii., 102-104 — 
Alchemists, v., 198 
Alchemy, ii., 53, 57 
contributions of, to Numismatics, 
iby Al 
Alcohol, v., 179 
solidification of, 19 
Alexander, Henry M., elected mem- 
ber, 147 
Alexandrite, Ceylonese, v., 131, 132 
Alge, vii., 21 
forming Sargasso Sea, iv., 58 
Alizarine, v., 193, 197 
Alkali industry, v., 192 
Alkaline metals, v., 215 
Alkaloids, v., 195 
Allanite, vii., 6 ; vili., 159, 185 
from Franklin Furnace, N. J., 
xlii., 102 
Alleghany belt, v., 78, 79 
Allen, J. A., elected Vice-President, 
xis 26 
Alligator, breeding habits of, xiv., 62 
Allionia incarnata, vii., 13 ; 
Allium, viii., 77 
mutabile, vii., 14 
Alnus oblongifolia, viii., 76 
Aloe, iii., 39. 
Allophane, vii., 251 
Alluadite, vii., 220 
Alluvium of New York Island, vii., 
50, 51 
Almandite, viii., 161 
Almucantar, v., 235, 261 
