INDEX. 



indent chemifts of inaccuracy without 



rcafon, 274.— On the chemical nature 



of ants, 283 

 Frank, 233 

 Friction, luminous appearances by, 1-05. 



—Medicines by, 279 

 Friendship, organ of, 225 



a 



Cadolin, 222 



Gall, Dr. outline ©f his eraniognomic 

 fyftem, 197, 224 



Gas, cheap flexible tube for, 5.— Sounds 

 produced in tubes by hidrogen, 23.— 

 Method of eftimating the changes of 

 volume during chemical experiments, 



3* 



Gay-LufTac, 32, 224 



Geography prize, 279 



Gerard, Dr. 136 



Gilpin, Mr. 39, 288 



Glaffes, memoir on achromatic, no. — 

 Comparifon between annealed and un- 

 annealed, 178— On the ufe of fulphate 

 of foda in making, 281 



Glauber, the inventor of Woulfe's appa 

 ratus, 6. — And of another fuppofed mo- 

 dern difcovery, 7 



Gluten, vegetable, the identity of it with 

 cheefe, 276 



Goodnefs, organ of, 234 



Gough, Mr. on the nature of grave har- 

 monics, I.— His reply to Dr. Young on 

 the nature of mufical founds, 139. — 

 His theory of compound fpunds, 152, 

 202 



Grapes contain a fugar different from that 

 of the cane, 280 



Grateloup, 113 



Grave harmonics, on the nature of, 1, 

 72.— Differ from p-i.nitive founds, 74 



Gravities, on the fpecific, of fpirituous li- 

 quors, 285 



Green fecula of plants difcovered by Rou- 

 elle, 276.— Is a peculiar animalized fub- 

 Aanee, ib.-~ Cbara&ers. of, 277 



Gregor, Mr. his analyfis of z variety of 



the corundum, 209 

 Guthrie, Mr. 163 

 Guyton, on the affinities of earths, 16 



H. 



Hadley*s quadrant, obfervations on, 218 



Hales, Dr. 162 



HaU, Mr. no 



Halley, Dr. 164 



Halos, coloured, round a candle, 182.— • 



Atmofpheric, ib. 

 Hand-mill, Scortifb, 220 

 Harmonics, grave, on the nature of, r., 

 72.— Differ from primitive founds, 74, 

 Harmonic Aiders, Dr. Young's account 



of, 10 1 

 Harriott, Mr. his engine for raifing and 



lowering weights by water, 44 

 Haflenfiatz, 2461 

 Hawkins, Mr. 214 

 Hawkfbee, Mr. 103 

 Heat, power of fluids as conductors o£» 

 56. — Internal motion of fluids occa- 

 fioned by, 75. — Its real zero, 221 

 — making rays, invifible, 99 

 Heliometer, ufe of Bouger's, for naval 



purpofes, 117 

 Henry, Mr. 212. — Concerning the inven- 

 tion of aromatic vinegar, 215 

 Herman, 258 



Herfchell, Dr. his obfervations on the two 



new planets, 120.—- Propofes to call 



them afteroids, 145. — Definition of the 



term, ib. 



Hidrogen gas, founds produced in tubes, 



by, 23 

 Higgins, Dr. 23 

 Hire, De la, 173 

 Hooke, Mr. his blow- pipe by alcohol, 



106 

 Huddleftone, L. Efq. his method of raw 

 fing or lowering veffels on canals, by 

 means of a plunger, 236 

 Human voice, analyfis of, 157 

 Hutton, Dr. 164 



HuygenS| 





