164 



INDEX. 



Potatoe, cultivation of, Considered as to its produce in potasli and 

 roots, xix. 331 



Potrero, or breeding-farm for horses, in Spanisli Guayana, de- 

 scribed, ix. 3 



I^owders, remarks on the component parts of, xiv. 372 



Powell (Rev. Baden), on light and heat from terrestrial sources, xix. 

 45,213, 216. Conclusions deducible from his researches into the 

 nature of the radiant heating effects from terrestrial sources, 305 



Prangos hay-plant of Northern India, account of, xix. 1 



Pregnancy, on the signs of, iii. 42 



Frehnite found in Tuscany, notice of, iii. 394 



Premiums, list of, offered by the Board of Agriculture, vi. 137. 

 For rail-road, offered by the Highland Society, 138 



for flax, offered by the Prince Regent, vii. 170. For 



Memoir on the progress of experimental physiology, 192. 

 Notice of various, offered in France, 198, 371 



Preparations (anatomical), notice on the preservation of, xx. 200 



PreseiTatk>n of meat by means of charcoal, iv. 367 



of wrecked persons, experiments for, vi. 135 



of milk, direction for, xii. 406. Of cauliflowers, 



ih. ; and of fresco-painting, 407 



of grain, description of a building for, xiii. 165. 



Of steel goods, 424. Of eggs, ib. 



,_ — ^ of echini, asterise, crabs, &c., xv. 172. Of anato- 

 mical preparations, 391 



Pressure and heat, action of, on certain fluids, xv. 145. Electri- 

 city produced by, 368. Light evolved by, ib. 



Prevost (Professor), on the causes of the constant proportion of 

 a^ote and oxygen in the atmosphere, ii. 421 



strictures on his observations on light, iii. 418 



suggestion of, for demonstrating the resistance of the 



atmosphere to falling bodies, vii. 369 



notice of the death of, viii. 195 



(Dr.), and Dumas (M.), examination of the blood by. 



and of its action on the different phenomena of life, xvi. 115 

 — experiment of, on the employment of electricity in cal- 



