342 
Oliva litterati, ix., 88 
Olivine, ix., 190, 191, 193 
meteoric, Kiowa Co., ix., 191 
meteoric, Turner mound, ix., 193 
meteorite containing, iv., 5 
in metorite, vi., 73, 74, 76, 162 
in metorites, viii., 161, 186 
Olenellus Zone, place of, viii., 176 
Ommastrophes, 1., 175 
Onagrariex, vii., 9 
Oncorhynchus nerka, i., 6 
Oneida conglomerate, v., 216 
Onoclea sensibilis, 1x., 31 
Onosmodium Carolinianum, ix., 185 
On photographs of Geisler and 
Crookes radiant matter tubes, 
xv., 156 
Ontonagon, Mich., glacial phenom- 
ena at, iil., 14 
Onyx, iii., 62 
Odlites, v., 62 
Opal, vili., 17, 30, 159, 161 
mines, Hungary, xi., 32 
Opals, ix., 150 
Opercula, ix., 34 
Ophileta complanata, xv., 21 
Ophiolite, vili., 3, 53 
Optic Nerve, in Brain of Skate, xv., 
148 
Opuntia, ii., 92 
Oracanthus abbreviatus., ix., 132 
fragilis, ix., 132 
grandis, ix., 131 
granulatus, ix., 132 
Milleri, ix., 131 
multiseriatus, ix., 132 
vetustus, ix., 132 
Orange, N. J., columnar trap, iv., 4 
Orange County, N. J., geology of, 
xv., 70 
Orbicular granite from Rhode Island, 
xiii., 140 
Orbits of comets, ii., 22, 23 
Orbulina, cf., universa, ovalis, ingens, 
intermedius, xiv., 109 
Order of Court, x., supplement 3 
Ordovician faunas at Larrabee Point, 
Vt., xv., 20 
at Shoreham, xv., 20 
rocks, xv., 19 
Oregon, fire opal from, viii., 159, 161 
Indian arrow heads of obsidian, 
iii., 63, 82 
snow peaks of, iii., 77 
INDEX. 
voleanic ash, i., 55 
Ore deposits at Franklin Furnace, 
IN PJ), Sal eG, 
Ores and minerals of Sussex Co., N. 
Wag Vile, PS 
of North Carolina, ii., 149, 150 
Ores, Lake Superior, iii., 1, 2 
silver, processes for amalgamation, 
THe dS) 
New Jersey Triassic, iii., 18, 19 
in San Juan Mts., v., 122, 128 
Organ-pipe sonometer, i., 163 
Organic aromatic bases, compounds 
of, i., 100 
compounds, new, li., 62, 63 
matter in water, determination of, 
ii., 111-114 
structure in graphite, ii., 148 
chemistry, discoveries in, v., 193- 
198 
progress in, v., 193-198 
matter in water, viii., 117 
Origin of alphabet, v., 81-88 
and distribution of Amphibian 
Cranial Nerves, xiii., 176 
and history of mineralogical 
names, xi., 49 
of mountains, xi., 45 
of garnets, xi., 32 
of carbon minerals, i., 109-111 
of carbon in shales, ii., 110, 111 
of graphite, ii., 148, 149 
of iron ores, li., 6-8, 13-17 
of leaf forms, ili., 38-44 
of Puget Sound, ili., 104 
of sounds in nature, ili., 75 
of petroleum, viii., 26, 27 
of rock strata, v., 78, 79 
of the heavenly bodies, xiii., 170 
Ornamental stones of N. A., viil., 160 
from Rome, ix., 95 
Ornaments, paleolithic, viii., 133 
Orobanchacex, vii., 12 
Orohippus, vii., 158, 159, 160 
Orsat apparatus, ii., 101 
Orthid, xiv., 128 
Orthis testudinaria, vil., 4 
Orthoceras pelops, 1., 57 
Oscillariz, vi., 49 
Orthoclase, ii., 25, 147; iii., 49; iv., 
42; viii., 12, 58 
in sandstone, ii., 119, 120 
from Weehawken, N. J., iv., 76 
in Granite Diorite, xiv., 83 
