PYR 
Pseudomorphous granite, vii, 22.f 
Pseudomorphs, siliceous, in Hamp- 
shire Co., Mass., xii, 256. 
Pseudo-voleanoes of the Upper 
Missouri, xlv, 154. 
Psora, use of chloride of lime in, 
xvi, 395. 
Pudding stone of Mount 
Mass., vi, 8, 69. 
Pulkova Observatory, xlvii, 88. 
Pulmonary consumption, work on, 
S. G. Morton, noticed, xxv, 424. 
Pultowa, monument of, ili, 379. 
Pumice, floating, xx, 161. 
at the Azores, iv, 259. 
of the Mississippi, i, 247. 
of the Missouri and Missis- 
sippi rivers, due to pseudo-volea- 
‘noes, J. IV. Nicollet, xlv, 154. 
Pump, by steam, xvi, 181. 
, air, see Air pump. 
Purple of Cassius, 11, 350; xx, 192 
xxviii, 145; xlviii, 192. 
Pursh, F., Maties of the herbarium 
of, xl, 1. 
Toby, 
10. 
, notice of, ix, 269. 
Putnam’s rock, v, 37. 
Putnam Hill, section of, xxix, 30.f 
Putrefaction, animal, xviii, 397. 
of stagnant water, prevented 
by animal charcoal, x, 189. 
Puvis, essay on lime as a manure, 
xxx, 1388. 
Pyrargillite, analysis and descrip- 
tion of, Nordenskiéld, xxvi, 387. 
Pyrenees, geological notice of, ix, 
23. 
——., botany of, remarks on, xiv, 
377. 
Pyrites, arsenical, in New Jersey, 
v, 244. 
, copper, see under Copper. 
, Iron, origin of, in fossils, 
Xxvill, 2938. 
4 , occurrence of, in fos- 
siliferous rocks, xxxi, 74. 
: , investing quartz, vege- 
eo stalks, &e., ih, Lyon, xu, 
62. 
210 
; botanical excursions of, xlii,| 
BY RB 
Pyrites, iron, ina peat field, J. T. 
Plummer, xliv, 312.£ 
é , Specific gravity of, 
xix, 388. 
5 , cause of decomposi- 
tion of, xix, 387. 
,» ——, of Rossie, complex 
erystal of, xlyi, 36.4 
4 , in Connecticut, i, 316 ; 
v, 44; vii, 56; x, 133 xxxiii, 
160. 
—, , in Georgia, xxiv, 9. 
—, , in Kentucky, iti, 233. 
3 , 10 Massachusetts, vill, 
Ha Rls VS swine 
: , in Missouri, il, 67. 
——, in New Hampshire, 
mii 129, 131. 
M , in New Jersey, v, 28. 
—-, , in New York, v, 12; 
xix, 224; xxv, 350; xxviii, 172. 
;|——-, , in North and South 
Carolina, ili,3;'v, 262; xli, 183. 
, , in Ohio, xvi, 156, 157. 
, , in Pennsylvania, iv, 4 ; 
Vill, 289s x 222s) exivel SaGe. 8. 
13. 
—-,, , In Vermont, 1, 115; 
lil, 76, 38263 vi, 245. 
Pyrochlore, analysis of, F. Wohler, 
xviii, 8925 xliti, 35. 
of Chesterfield, Mass., J. E. 
Teschemacher, xlviii, 395. 
, identical with microlite, J. H. 
Teschemacher and A. A. Hayes, 
xliil, 33. 
and microlite, not identical, 
C. U. Shepard, xliii, 116; xlviil, 
177. 
, analysis of, xlvi, 163, 
Pyro-citrie acid, new, vil, 187. 
Pyro-gallie acid, J. Pelowze, xxviii, 
126. 
Pyrogenic acid, new, xxxiv, 206. 
Pyroligneous acid, 11, 340; v, 188; 
ix, 201. 
purified by animal char- 
coal, xiil, 175. 
, medical use of, ix, 201. 
Pyrometer, steam, W. R. Johnson, 
xxii, 96.f 
