Index. 837 



Powder of different degrees of strength, comparative value 



Of . i, 72. 



Priestley's observations on air produced from water, i, 219, 221, 230. 



Principles of the harmony of colours iv, 63-71. 



Production of air from water -i, 191-231. 



Propagation of heat in fluids i, 237-400. 



liquids ii, 269, 274-289. 



mercury i, 434. 



moist air. i, 425. 



rarefied air i, 430. 



various substances .... i, 401-468. 



Proposals for building a frigate on a new construction . . iv, 683. 



forming an establishment for the poor . iv, 361-369. 



the Royal Institution . . . . iv, 739-770. 



Prospectus of the Royal Institution of Great Britain . iv, 771-785. 



Providence, goodness and wisdom of, as shown by his 



works i, 312-333, 429, 464-468. 



Public institutions in Bavaria, short account of . . iv, 493-507. 



kitchens, establishment of iv, 364. 



Pudding, hasty iv, 454. 



Pyrometer, Wedgwood's, faulty ii, 410. 



RADIANT heat ii, 498 ; iii, 39. 



Radiation and conducting power, connection between . . ii, 59. 



from cold bodies . . ii, 61. 



influence of, in the heating and cooling of 



bodies ii, 57. 



Radiations from different surfaces differ in intensity . . ii, 178. 



solid bodies ii, 169. 



law of calorific and frigorific ii, no. 



Reflections on heat ii, 166-187. 



Refraction of light iv, 175. 



Register-stove iii, 368. 



Report of regulations introduced into Electoral Army iv, 692-735. 



Resistance of air to light iv, 20. 



Roasters, account of . . . . . . . iii, 148, 252-266, 283-314. 



directions for setting .iii, 266. 



management of ...... .iii, 273. 



miscellaneous observations concerning . . . .iii, 278. 



and ovens, best method of covering doors of . . iii, 289. 



