424 
eres documents relatifs au chauffage, ii,) 
age am theory of interpen- 
Geation, 
uze, ON petroleum, vi, 413. 
Ge, earthquakes in Pacific, 
Pendleion, 
xl, 364. 
Penn., nesgnetle survey of Fach V, 309. 
oil regio of, Sayles 
Penobscot bay, glacial ae th in, V, 249, vi, 
274, vii, 335. 
Perey’s Metallurgy, y, 118, viii, 149. 
Perkin, W., color oring matters from 
roles ‘ii, 267, “116. 
auve, Vii 
Permeability of i iron, va, 441, 
ermian, see GEO 
Perrey, 5 tiesey of ctiaackek. vii, 1. 
on volea anoes of Kurile Is., noticed, 
Dare rsia, Khanikoff on, a — 
Peru, oa BC in, x 
Paermann, o gree Po ole, x1, 393, 
Peters, 7 sminice * iv, 221, V ii, 271. 
Petherick’s Expedition, ii 
Petrifaction ofanimal substances, viii, 441.)| 
Petro 
eum, Albert coal related to, ix, 267, 
INDEX, VOLS. XXXI—XL. 
Phoboarenhin collodion, formule for, ii, 
426, v, 
co oe | Emerson, ivy 413 
invisible i image, Lea, xl, 109, 
plate, iod ized, action “ electric light 
on, Vii, 207, viii, pee 
ensiti e, action of light on, v, 286, 
nsparency, ‘Miller Vi, 03, viii, 107, 
ae of spectra, Miller, i i, 408, vi, 
103, viii, 107. 
faded, ellow color of, vii, 438. 
Photography applied to he. icraeal 
R 
astronomical, i 369. 
dey at ng solu tion in, Verrill, ix, 221. 
dr. cess in 
angulatum, ii, 335, 
ae e light for, vii, 440, x1, 287. 
Mayer = on, ‘notice ed, V, 269. 
military, iii, 1 
miscellaneous facts aah. vi, 419. 
1%. 
mmonia in, Vi, 417. 
SON, iv, le 
1 
merican, PLS ate ha Renatlon: Physics, Lapel are nk in, iv, 27. 
Cah olec 
; Pelouze 
California, aie on 101, 341. 
Chicago, 
A 
mer, Vi, 115, 
vi, 413. 
lar, Norton, viii, 61, 207, ix, 237, 
ee xl, 61. 
Silliman’s Mogg ate of, i, 1 
e Electricity, Heat, Se iagntion 
Michigan, peck position of, Win- Picramic acid, Tat fe 
chell, ix, 350, 
Pennsylvania, ix foe 
chem. an peor hie t. of, et vy, 157. 
geol. relations ae Andrews, ii, 85. 
on 201. 
s, Evans, vii, 1 
bi further, Hi ean Asphaltu: 
panacea i; 2 iat ” me 
Phe enylic ¢ acid changed to rosalic, iv, 408. 
‘Philadelphia Acad. Nat. Sci., J ournal and inom distances. 
9, law of, 
“ 1805, iii, 159, iy, 305) 
51, vii, 156, "449, viii, 1E2,| 
451, ix, 116, xl, 143. th 
Phillips's life on the ea’ rth, reviewed, i, 444. 
oad ae sete ’ Ritchie's ill 
56° 
450, v, 156 , Vi, 
a Bnkacriie vi, 423. 
Phosphate. of lithia, F; resenius On, i iii, 416., 
Pho ona oo Chancel’ 
Pitt ae cks, Schiel, i, 353. 
Prospiras, action of, on metal solutions 
ein Nickles, iii, 1 
coloration of flame br 4 267. 
-eyanid of, vii, 269. mM = 
luminosity of, iv, 437, 
Series, polyatomic bases of, i, 420. 
spect iii, 214, vi, 267. 
rum i 
Phosphuretted hydrogen, Bose, vill, a 
— 
enate changed to rosalate of lime, iv, regs Die fluorescens dea Tientes, 
ustra-| 
determination 
_ Brewster’s improvements in, ii,| Poey 
Pic 
Pictet 
Pil 
te) 
analysis of 
garnet of Elba, viii ii, 111. 
; ichs, ix, L 
'|Planetoloy, Hinrichs, ix, 46, 134 
Fy 
pink e, Hinrichs, xl, 131 . 
| origin 0 f, f. Trowbrid ix, 30. 
€ also Asteroi ‘ 
‘ Plans, no nd rphism in, 
V, 285, 419, vi, 279, ix, 101, 104, 360. 
ei il, of Ni ka, He 435. 
A see further, BoTany. 
latinum, American process of working, 
Storer, alae 124. eis us si, 
om Oregon, metal in, 
etal, v, 256 Gibbs, i, 63, iv, 341, vii, 
; Lea, viii, 81, 248. a 
Playfair, 3 on density of vapors, iii, = 
Pleurodyctium pro! a det y, 82. 
Ple 
"esi, tT, obi a seeogs f xl, 396. 
i) 268. 
ure of mark- 
f the Atlantic, iii, 
) 
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