PRE 
Preservation of specimens, new 
mode of, J. L. Riddell, xxxv, 
338. 
of eggs, Scotch method, xxvi, 
188. 
—— 
for cabinets, xxi, 161. 
of insects, T. Roger, xix, 
213. 
— 
5 XIX, O65 xxi, 162: 
of freshwater shells, xlii, 891. 
of Echini with the spines, 
XX1X, 393. 
of skins, xxvi, 188. 
of fish skins for museums, 
xxxvi, 196. 
of anatomical preparations, 
vi, 384. 
of skeletons, xix, 57. 
of animal bodies, new mode 
of, by petrifaction, G. Segato, 
XXIx, 309. 
of animal preparations, by 
Gannal’s new process, xl, 194. 
xxx, 183. 
of crystalline lenses, xxvi, 
216. 
of dead bodies, i, 307. 
of meats, &c. by Appert’s 
process, xill, 163. 
of fruits without sugar, meth- 
od of, xv, 381. 
of substances by alkalies, 
xxill, 383. 
of cordage, &c. from mois- 
ture, xxill, 199. 
of firemen against fire and 
flame, xvili, 177; xx, 96.f 
of grain from mice, vil, 378. 
of timber by pyrolignite of; 
iron, Boucherie, xl, 213. 
of the Royal George, xl, 213. 
from rust, a mode of, by, 
means of caoutchouc, vi, 398. 
of iron from rust, xix, 203; 
xxi, 150; xxii, 882; xxiii, 199, 
383. 
Presl, notice of the Genera Filea- 
cearum of, xxxix, 174. 
Press, botanical, J. Locke, xxx, 54 
208 
of animal substances, salt for,| 
» Printing, see Printing. 
PRI 
Pressure in the ocean at 
depths, see Ocean. 
, atmospheric, see Barometri- 
cal. 
on the human body, variations 
of, and apparatus for withdraw- 
ing, xxxiv, 30. 
, effect of instantaneous, as 
compared with accumulative, 
C. Bonnycastle, x\, 32. 
Price of labor and subsistence in 
some parts of Europe, xxxvi, 
176. : 
Priestley,J. philosophical character 
of, W. Henry, xxiv, 28. 
, discoveries by, xxiv, 30. 
Primula farinosa, iv, 59. 
Prince, James, on the sea-serpent, 
ii, 154. 
Prince, John, memoir of, xxxi,201.f 
Prince, W., a fruit, between the 
Spanish chesnut and the Mary- 
land chinquapin, iil, 77. 
Prince Regent’s Inlet, geology of, 
xvii, 10. 
Princeton, battle of, painted by J. 
Trumbull, xxxix, 231. 
Principia of Newton, new edition 
of, vi, 379. 
, review of, xi, 238; 
xil, 28, 880; xii, 311. 
Prinos coriaceus, v, 293. 
Printing on zinc, x, 388. 
,a mode of stereotyping by 
Senefelder, xi, 386. 
, Invention of stereotyping, 
xvil, 161. 
, Slereotype, original papers by 
C. Colden and B. Franklin on, 
xxiv, 319. 
designs, new mode of, vii, 191. 
, anastatic, xlix, 401. 
press, improvements in, by 
J. I. Wells, iii, 811.f 
, inking machine, Wood’s, 
xxili, 103. 
for the blind, v, 385. 
Prisons, Society for the Ameliora- 
tion of, i, 874. 
Prizes offered by the Royal Society 
great 
of London, xxv, 412. 
