INDEX. 
C page 
Charcoal and Hydrogen, on the aeriform compounds of them, 
with an account of some additional experiments on the 
gases from oil and coal, - - - 136 
Chlorine and Carbon, on two new compounds of it, - 47 
on a new compound of these sub- 
stances, - - - 392 
Chronometers, on the effects produced in their rates by the 
proximity of masses of iron, - 361 
Coal, experiments on the gas produced from it, - 151 
Croonian Lecture, microscopical observations on the fol- 
lowing subjects : on the brain and nerves, showing that 
the materials of which they are composed exist in the 
blood : on the discovery of valves in the branches of the 
vas breve, lying between the villous and muscular coats 
of the stomach : on the structure of the spleen. By Sir 
Everard Home, Bart. - - - - 25 
Cube, Cylinder, and Sphere, an account of the re-measure- 
ment of those used by the late Sir George Shuckburgh 
Evelyn, in his enquiries respecting a standard of weights 
and measures, - - - - 316 
D 
Davy, Sir Humphry, Bart. On the magnetic pheno- 
mena produced by electricity, - - - 7 
— Some observations and ex- 
periments on the papyri found in the ruins of Hercula- 
neum, ------ 191 
Farther researches on the 
magnetic phenomena produced by electricity ; with some 
new experiments on the properties of electrified bodies 
in their relations to conducting powers and tempera- 
ture, - 425 
Davy, John, M. D. An account of the urinary organs 
and urine of two species of the genus Rana, - 95 
Dollond, George. A11 account of a micrometer made of 
rock crystal, - - - - 102 
Dugong, from Sumatra, an account of its skeleton, - 268 
on the peculiarities that distinguish 
it from the Manatee of the West Indies, - - 390 
