I 



E X. 



A. 



Aberrations of refrangibiiity how 



corre&ed, no 

 Achromatic glaffes, memoir on, no.— 

 Hiftory or", ibid.— Double refracting, 



Acid, acetic, a foivent of camphor and 

 effential oils, 215. — Two vegetable acids 

 in ants, 284 



Adipocire, comparifon of it with myrtle- 

 wax, I35 V 



Aikin, Dr. 216 



Air, fixed, not decompofed by iron, 69. 

 . The particles of are agitated by found, 

 but not fenfjbly removed, 155 



Air-gun, flafh from an, 280 



Alexandre, 188 



Alphabets of convention, 246 



Animals, winter fleep of, 278 



Animal-cotton, memoir on, 266. — Su- 

 perior to vegetable, 271 



Ants, on the chemical nature of, 283.— 

 Simultaneous exiftence of two vegetable 

 acids in, 284 



Apparatus, improvements in Read's pneu- 

 matic, 6. — Woulfe's invented by Glau- 

 ber, ib. — For conveying found to a 

 diftance, 69 



Aqueous vapour in the atmofphere, 162 



Aromatic vinegar, invented by Mr. Henry, 

 215 



Afl'affination, organ of the inftindt to, 

 226 



Afteroids, propofed name for the new pla- 

 nets, 144, — Definition of it, ib. — Co- 

 mets may become, 146 



Atkins on the fpecific gravities of fpiri- 

 tuous liquors, 285 

 Vol. IV. 



Attachment, organ of, fta$ 

 Ayton, Mr. 194 



B. 



Barges, method of raifing or lowering In 



canal*, 236 

 Baudry des Lozieres on animal-cotton, 



266 

 Baume, 279 

 Bayley, Mr. 215 

 Beccari, 277 

 Beccaria, 114 

 Bee's wax, comparifon between it and 



myrtle wax, 133 

 Berard on the methods of fecret writing, 



247. — New method by means of a fte- 



ganographic fcale, ib.— By intercalation, 



249 » 

 Bergman, 257 

 Bertholet, 22 



Bigg, Mr. propofes a leclurefliip at New- 

 castle, 59 

 Biliary calculi, comparifon of the chryf- 



talline matter of f with myrtle wax, 



136 

 Blagden, Dr. 58 

 Blair, Dr. 95, 97, 113 

 Blanc, Mont, afcent of, 206 

 Blow-pipe by alcohol, with a fafety-valve, 



106 

 Boats, method of raifing or lowering on 



cana'.s, 236 

 Bojames, Dr. on the craniognonuc fyf- 



tem of Dr. Gall, 197, 224 

 Bodies fluck in the throat, inftrument for 



extracting, 175 

 Borda, in 

 Boftock, Dr. his experiments and obfer- 



vations on myrtle wax, bee's wax, fper- 

 b « maceti 



