154 INDEX. 



Parturition facilitated by the use of ergot, or spurred rye, ii. 66 

 - symptoms of, iii. 43. 



Paste, directions for making, that will not become mouldy, xv. 141 



Passions, influence of, on the human frame, illustrated, iv. 209 



Pastora (Capuchin mission of), notice of, ix. 13. Excursion 

 into its vicinity, 14 



Patent medicines, analysis of, xiv. 374 



Patter (M.), notice of a new moving power discovered by, 

 vi. 349 



Pa VON (Don Jose) on the native country of the potatoe, x. 25 



Paten (M.), experiments of, on the discolouring power of differ- 

 ent substances, xix. 165 



Payne (M.), new vegetable principle discovered by, xvi. 387 



Peach of China, notice of, xv. 105 



Pearl, beautiful Scottish, notice of, xii. 427 



— artificial production of, xix. 167 



Chinese mode of forming, xx. 411 



Peck (Mr.), observations of, on the sea serpent, vii. 68 

 Pbckston's (Mr.) treatise on gas-lighting, notice of, vii. 318 

 Peclet (M.), new process invented by, for extracting elaine from 



oils, xvi. 109 

 Pelletier's (M.) observations on the venom of the common toad, 



V. 127 

 — — facts and experiments by, relative to gold, x. 117. Che- 

 mical researches of, in conjunction with M. Caventou, on cin- 

 chonine, 388 



■ on the analysis of the active principle of pepper, xi. 398 



— . researches of, on strychnine, and on the processes em- 



ployed for its extraction, xiv. 217 



on the active principle of the upas poison, xyiii. 176 



Pendulums, importance of the discovery of, iii. 13. Problems 

 and observations on those vibrating between cheeks, 14. Ob- 

 servations on the length of the seconds, 158 



— — — experiments for determining the length of one (for a 

 clock) vibrating seconds in the latitude of London, v. 108. 

 Observations necessary to obtain the number of vibrations 

 made by one during a given interval, 203 



