INDEX. 



A. 



ACCUM, Mr. his examination of a 

 ftone containing potafli, izy— His pro- 

 cefs for obtaining aiumine pure, 260 

 — Defcriprion of his improved chemical 

 lamp with double concentric wicks, 

 266 



Acid, nitrous, accenfion of fulphuretted 

 hidrogen gas by, 144 



' phofphoric, abundant in vegetables, 



Z4I 



— — fuberic, contained in paper, 14a 



Acids, neutralization of, by the metallic 

 oxides, 273 



Affinity, chemical, of common air, ex- 

 amined, 145— Of the gafes for each 

 other, is alike in all, 148 



Air, on the change which it undergoes by 

 refpiration, 40— On the fuppofed che- 

 mical affinity of its elements, 145 — Its 

 denfity is the caufe of the various phe- 

 nomena of combuftion, 146 — Is not 

 diflblved by water, 149 — Poffefles hy- 

 grometrical attrailion, -245 — Reafons for 

 confidering it an homogeneous fluid, 

 ib. 



Alchemy, on the refearches which con- 

 ftitute the fubjefts of, 27 



Alcohol, its mutual repulfive adion with 

 other fluids, 201 



Aiumine, on the difficulty of obtaining it 

 in a ftate of purity, 141 — A method 

 pointed out, 260 — Is precipitated by the 

 metallic oxides, 274 



Amber, large fpecimen of, 143 



Ammonia, its repulfive action on other 

 fluids, 204 — Diffolves oxide of iron at 

 a minimum, 272 

 Vet. VIS. 



Animal body, efFefts of galvanifm on the, 



179 

 Apparatus, for filtering water, defcription 



of an, 126 

 — — — — galvanic, on the means of fim- 



plifying and improving, i— In a fingle 



piece, 3 — Affording a larger furface for 



oxidation, and convertible into one or 



more plates, 79 

 Arch of the meridian meafured in the 



My fore, 18 

 Arnold, Mr. 47 

 Arfeniated copper, Hauy'sobfervatlons on, 



187 — Varieties of, 1S8 — Analjfes of, 



189 — Count de Baurnon's leply, 247 

 Afh, Dr. 72 



Aflies of lead, compofition of, 284 

 Atmofphere, comparifon of its tempera- 

 ture with fea water, 132 

 Attradion hygrometrical, is diminilhed 



by the acc^-ffion of water, 244 

 Azote, eledlricity does not fufe lead 



placed in, 82 



B. 

 Banks, Sir Jof. 221 — His report of the 



ftate of nis Majefty'a flock of finr- 



wooled Spanifh ftieep, 277 

 Bartholdi, Prof, on fpontaneous infl.im- 



mations, 216, 236 

 Barton, Dr. on the fafcinating faculty af- 



cribed to the rattle- 1 n-.ke and other 



American lerpents, 58, 100 

 Beaupoil, on the viiiues and princ'plea 



of cantharides, 76 

 Bedford, Duke of, 279 

 Bergman, 272, 280 

 Berthoiiet on the differences between heat 



and eledricity, 80 — His obfervations oa 

 W Couo^ 



