INDEX. 
page 
Lussac, Gay, and Thenard, their opinion concerning the 
metals of the fixed alkalies, mentioned, - 17 
their reasonings concerning the 
nature of the fusible substance obtained by heating potassium 
in ammonia, - 18 
— their opinions controverted on 
their own statements, - - - 19 
their experiments on muriatic 
and oxymuriatic acids referred to, - 232, 235, 237 
M. 
Macartney, J Eso. his observations upon luminous animals, 258 
Alagnesia , its composition, - - i>3 
observations on its effects, in preventing an increased 
formation of uric acid, - - 136 
— its effects on the urine, - I 44 
M udge, Lieut. Col. his astronomical observations made at 
the Royal Observatory, noticed, 194 
Muscular Action , on the duration of. 
N. 
Newton, Sir Isaac, his explanation of the blue and red 
bows, referred to, - * 150 
Nitrogene, attempts to decompound it, - - 47 
O. 
Oxide, Cystic, the name given to a new species of urinary 
calculus, - 223 
P. 
Pearson, Dr. Lis observations and experiments on pus, 294 
Parallax, annual of a Lyra, - - 204 
Piazzi, M. his table of mean refractions, noticed, 195 
P/iolas daclylus, its luminous fluid, - - 280 
Phosphorus, experiments on, - - 253 
no oxygene evolved from it, by the agency of 
oxymuriatic acid gas, - 257 
Pliny, his observations of the luminous fluid in the pholas 
dactylus, noticed, - - 280 
Potash, its decomposition, by oxide of tellurium and charcoal 29 
Potash , muriate of, its composition, - 36 
Presents, a list of those made to the Royal Society, from 
November I 809 to July 1810 , 319 
