350 



INDEX. 



Paper, incnnbustible, 311. 

 Park, Mungo, 134. 

 Parkinson, Mr. 



Payne and Ovenden, Messrs., their por- 

 table instrument for ascertaining the 

 quantity of giruin by weight, 198. 

 Peak of Derbyshire, models of, 296, 

 Perpenti, Madame, her improved mode 

 of manufacturing incombustible cloth 

 and paper from the acanthus, Si 1. 

 Periseopie camera and microscope, 



26. 100. 

 Philips, Mr., on the veins of Cornwall, 



221. 

 Philosophical Transactions, account of, 



72. 

 Plants, motions of the tendiils of, 37. 

 Play fair, Mr., 69. 

 Poisons, their action on the animal 



system, 9. 

 Pon , M., his discovery of a new co- 

 met, 76- 

 Pontine marshes drained, 80. 

 Porret, Mr. R., jun. on the explosive 

 c« mpound of chlorine and azote, 

 180, 276- 

 Priestley, Dr., 50. 35. 

 Pringle,Sir J., 5* 



Printing, benefits of the art of, 113. 

 Prior, Mr. G-, his description of a re 

 montoire escapement for pendulum 

 clocks, 136. 

 Proust, M., 241. 

 Publications, new, 72. 151. 2.4. 

 Pump, improved, for raising water 

 from wells or mii:es, while sinking 

 or making, 64. 

 Putrefaction, experiments on, 49. 



R. 



Rallier des Ourmes, M.., 194. 291. 

 Ramond, M., on the vegetatiou of high 



mountains, 16. 

 Rathoff, M., ',40. 



R. B. on the juvenile results of Bec- 

 caria s s observations upon the elec- 

 tricity of the atmosphere during 

 serene weather ; together with those 

 of Romayne and Henley, 126. 



Rice, improvement in hulling and 

 cleaning, iff. 



Reid, Mr. T., 1 16. 



Robertson, M , his invention of a 

 speaking automaton, 229. 



Rochon, Abbe, hi* method of multi- 

 plying copies, 115.— On achromatic 

 lenses, 117. 



Rodriguez, Don J., on the measure- 

 ment of three decrees of the meridian, 

 byheut.-col. W. Mudge, 00. Reply 

 to his animadversions on Dr. O. 

 Gre^oiy's Tii^onometsical survey of 

 England, 246. 



Roentgen, his recent travels in the 

 inteiiorof Africa, 134. 



Rnget, Dr., 174. 



Romayne's apparatus for ascertaining 

 the degree of atmospheric electri- 

 city, 1-9. - 



Root, cube and square, extraction of, 

 195. 311. 



Rumford, Count, on the excellent qua- 

 lities of coffee, and the art of making 

 it in the highest perfection, 56. 



, on the structure of 



wood, the specific gravity of its solid 

 parts, and the quantity of liquids and 

 elastic fluids c ntained iu it under 

 various circumstances : the quantity 

 of charcoal to be obtained from it, 

 and the quantity of heat produced 

 by its combustion, 319. 



S. 

 Sadler, Mr., his perilous aerial voyage, 



75. 

 Saint, Mr. W., his vindication of the 



claims of the American boy to 



extraordinary talents and original 



discovery, 291. 

 St. Michael's, hot fountains in, 305. 



