INDEX. 
Procyon lotor ileo-colic, junction of, 
xii., 50 
Products of ozokerite, ii., 48, 49 
Productus, v., 122 
Preetus, vii., 247 
Progress in astronomy, v., 234 
of standard time, xi., 45 
Projections, lantern, x., 103 
Prominences, solar, v., 244, 245 
Proserpinaca palustris, iii., 43 
pectinacea, iii., 44 
Prosopis glandulosa, ii, 92 
juliflora, vii., 9; ix., 184 
Protxoides daphnogenoides, xii., 36; 
xili., 130 
Protagraulos priscus, xiv, 139 
Protection of building stone, ii., 76, 
TAG 
Protective influence of mitigated 
virus, v, 204-213 
mimicry, viil., 117 
Protobatis quadratus, xii., 39 
Protochlorite, viil., 53, 54 
Protococeus, vili., 68-115 
pluvialis, vili., 68 
viridis, vili., 68 
Protohippus, vii., 159 
Protolenus Fauna (by title), xiv., 100 
more primitive and more pelagic 
than that of Olenellus, xiv., 102 
possibly cotemporaneous with the 
Fauna of Olenellus, xiv., 102. 
Protolenus paradoxoides bituberculatus, 
xiv., 145 
Protopterus, xii., 244 
Protospongia, xiv., 112 
Protozoa, v., 54 
Protozootites, new species, ix. 32 
Prunus demissa, viii., 80 
Psammite, vili., 43, 44 
Pseudomophs, viii., 45, 54, 60 
after garnet, iii., 1 
copper, ix, 140 
Pseudotsuga Douglasii, viii., 78 
Psilophyton princeps, vi, 5-9 
Pterichthys, ii., 144 
corrugatus, lil., 32 
Pterophyllum Blasii, vii., 115 
Braunsti, vii., 115 
princeps, vii., 115 
Ptychoceras, i1., 94 
Pthalic acid, v., 195 
Ptycholepis, v., 18 
Marshii, vi., 127 
549 
Ptychoparide, not in the Protolenus 
Fauna, xiv., 150 
Publication Committee, report, iii., 
12, 70 c 
fund, list of contributors, iii., 121 
Committee, ix., 1, 107, 108 
fund, money for, xiv., 92 
Publications of Academy, list of re- 
cipients, lii., 138-149 
of the Academy, viii., 1, 2, 41, 117, 
127, 128, 152, 177 
Public lectures, xv., 62, 123, 146 
Puerco, relation to the Laramie, xii., 
69 
Puget Sound, origin of, iii., 104 
Pulmonate molluses, lingual denti- 
tion, ili, 71 
Pumice, i., 49-52, 56 
Pupa longurio, ii., 152 
Purification of water, vi., 42-58 
Pyreesolite, vili., 59 
Pyramids of Egypt, ii., 114-116 
Pyridines, v., 195 
Pyrite, 1i., 25, 90; 94; 138, 189, 149; 
iii., 21, 23; iv., 41; vi., 71-130; 
viii., 54, 56, 57, 60, 140; xii., 69 
Pyrites, v., 121, 192, 230 
Pyrogranil, ix., 149 
Pyrope, viii., 161 
Pyroteehnical photography, ix., 76- 
og 
Pyroxene, viii., 58 
Pyroxene, ii., 9-25; iii., 18; iv., 42 
in iron ore, v., 221 
Pyroxenes from New York State, 
xiii., 208 
of New York State (by title) xiv., 
100 
Pyroxenite, vi., 130; viil., 53-55 
hollow crystals, vi., 112, 122-124 
hydrophane, vi., 111, 112 
Pyrrhopappus Carolinianus, ix., 184 
multicaulis, vii., 11; ix., 181 
Pyrrhotite, ii., 25-147; vii., 254 
Pyrrol, v., 195 
Quaker Bridge dam, viil., 117-125 
Quartz, ii., 100-118; iii., 12, 18, 23, 
49, 72 
after calcite, v., 133 
coated with chlorite, v., 214 
cutting of, ete., v., 266, 267-277 
from Arizona, v., 133 
from Arkansas, v., 265 
