INDEX. 



A, A. on ,;i?rofeflbr Parrot's filtering 



machine, 40 

 ^Abforption by charcoal, experiments on 

 the, ^iss 



Acetate of cerium, 300 



Achard, 37 



Acid, Pruffic, its unalterabllity at a high 

 temperature, 278. — Its combinations 

 wiih different bafes, 279 



Acouftic tubes, tranfoiit found without rc- 

 fleftion, a86 



Affinity, chemical, the caufe of the gal- 

 vanic aftion, 121 



Air, atmofpherical, is not a mechanical 

 mixture of oxigen and azote, 107.— Is 

 a gazeous oxide of azote, 109. — Expe- 

 riments on the abforption of it by char- 

 coal, 262. — Yields light and heat by 

 compreflion, 302 



— — gun, light and heat produced by the 

 compreffion of the au: in an, 302 



Alcohol does not diflblve ftarch, 74. — Not 

 fo good a menftruum as fpirit of tur- 

 pentine for copal varnifhes, 155 



Aldini, 175 



Alexander commanded his army with a 

 fpeaking trumpet, 283 



Amicus on the fufpenfion of zinc in hidro- 

 gen, and confequeat ignition and fufion 

 of platina, 24 



Ammonia, its ufe in the preparation of 

 copal varnilh, 154 



Analyfis of a liquor for rendering ftuffs 

 impermeable to water, 253 



' of a triple fulphutet of lead, 



antimony and copper, 14 



Animah do not hear by the refleaion of 

 found, 285 



Vox.. IX. 1804. 



Antis, Mr. J. defcriptjcm of his inftrti* 

 ment for counting the lifts from a mine> 

 114 



Apparatus for locking wheel carriages, 177 

 ' philofophical advantages of pub- 

 lifhing improvements in, 225 



•— ■ — fimple and cheap for filtering 



water, 95 

 Arfeniates of cerium, 299 

 Artillery, propofed method of deftroylnj 



it, 232 

 Aftronomical prize, 301 

 Azote gas, vegetables die in it for want of 



their proper ftimulus, 2x9.— >A£lioaof 



charcoal on it, 264 



B. 



Bacon, Lord, 87 



Beaupoil, on the virtues and principles of 



cantharides, 41 

 Bees, mechanical operations of, i82.-« 



Different kinds of, 186.— Real wantaK 



of, 192 

 Bees-wax, on the latent heat of, 45 — Oa 



the origin of, 182.— Its principles are 



contained in honey, and in fugar, 191 

 Benzoate of cerium, 300 

 Bergman, 27, 30, 49, 67, 291 

 Berthollet, 80, 247 

 Bifmuth, on the latent heat of, 45 

 Black, Dr. 45 

 Blow-pipe, afting by the preffure of water, 



*5i H3 

 Bode, Profeffor, on a new planet, 14a, 



301 

 Bodies, cold deprefs the temperature by 



radiation, 194 

 Bofwell, Mr. defcrlption of his lamp for 



burning tallow, 145. — On the improved 



conftrudion of the fhip economy, i66 

 b Boultoaji 



