INDEX. 161 



portion between the load and draught of horses in waggons, 



i. 18. on barometer tubes, 121 

 Playfair (Professor), observations of, on some appearances on the 



sides of the mountains in Switzerland, ii. 459 

 Plumbago, notice of artificial, in coal-gas retorts, xv. 159. 



fusion of, xvi. 157 



Plutonian theory of the earth, sketch of, xix. 74 



Plutonium, a new metal, notice of, ii. 120 



Plymouth, breakwater at, v. 120. Incombustible storehouse at, 354 



Pneumatic apparatus, new stop-cock for, described, viii. 347 



Pneumato thorax, remarks on a cause of, xvii. 130 



Poisons (corrosive), on the classification and treatment of, iii. 47. 



Astringent, 50. Acrid, 51. Narcotic, 52. Narcotic acrid 



poisons, 53 



(vegetable), remedy for, x. 192 



of the viper, experiments on, x. 193 



■ — detection of, xiv. 218 



poisoning by arsenic, tests for detecting, xvii. 167 



by the acetate of morphia, how detected, 168 



action of, on the vegetable kingdom, xx. 191. Relation 



of a case of poisoning by the honey of the Lecheguana wasp, 



404 

 PoissoN (M.), extract of his memoir on the theory of magnetism, 



xvii. 317. xix. 122 

 Poland, notice of organic remains in, xvi. 179 

 Polar ice, account of the formation of, iv. 247 



seas, observations on the expedition to, v. 182 



Polarization of light, experiments on, ii. 174 

 Police (pharmaco legale), severity of, xii. 331 

 Polishing-powder from charcoal, xi. 203 

 Polyhalite, analysis of, vi. 170 



Pombea genus, notice of, iii. 126 



Pomegranate-root, use of, as an anthelminthic, xviii. 412 

 Pompeii, conjectures on the probable cause of the destruction of, 

 V. 382 



beautiful vase discovered at, vii. 303 



M 



