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 Ro5'^al 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. 



