INDEX. 
Berzelius, Professor. His experiments on ammonia men- 
tioned, _____ 
Boracic acid , experiments on its decomposition, 
Boulton, Watt, and Co. Coal gas applied to the light- 
ing of their manufactory, - - 
Brande, Mr. William. His letter on the differences in 
the structure of calculi, and on the effects that are produced 
upon them, by the internal use of solvent medicines r 
Brodie, Mr. His dissection of the wombat, 
page 
353 
343 
131 
223 
306 
C 
Calculi , differences in their structure, and on the effects that are 
produced upon them by the internal use of solvent medi- 
cines, - _____ 223 
on those formed in the kidneys, - 224 
- which have been retained in the kidney, - 226 
of the urinary bladder, - - -221 
practical observations on the effects of solvents on, 245 
Carbonic acid , experiments on the quantity emitted in respira- 
tion, - - 2 65 
Circle , the circumference of, on a new property of three arches 
trisecting it, - - - - 1 20 
Coal , gas from, an account of its application to economical • 
purposes, - - - - 126 
Comet, its nucleus. - - - - 14 7 
its head, - - - - 150 
its coma, - - - - 15 1 
• its tail, - - - - - 151 
its nebulous appearance, - - - 153 
Compound inflammable gases from different species of Coal, table 
illustrating their composition, - 237 
Compound sulphuret of antimony , tin and copper, on its compo- 
sition, - - 55 
- — on the form 
of its crystals, _____ 60 
Crab-tree, experiments on its bark, - - 104 
Cretinism , some account of, - - - 1 1 1 
D 
Davy, Humphry, Esq,. His Bakerian lecture, upon some 
new phenomena of chemical changes produced by electri- 
city, particularly the decomposition of the fixed alkalies, 1 
