INDEX. 
ChyazateSf sulphuretted^ a description of their salts, - 552 
Chj^azate of barytes, ferruretted, 2iii?i\ysh it^ - - 535 
of per-oxide of irouy ferruretted, analysis of it, 535 
of potash, ferruretted, - - 533 
— — remarks on the objections made 
to the use of it as a test for the quantity of iron in solutions, 538 
of barytes, sulphuretted, analysis of it, - 555 
of protoxide of copper, sulphuretted, 2^n2dy^h q{ i\., - 554 
Circle, on the elliptic representation of it upon a plane sur- 
face, by perspective, - - - 374 
Circles, astronomical, an improved method of dividing them, 419 
Colburn, an account of a remarkable monstrosity in a family 
of that name, - - - - 94 
Comet, a new method of deducing a first approximation to its 
orbit from three geocentric observations, - - 121 
Copper ore, analysis of a new species of it, - - 45 
CouuTois, M. the discoverer of a new substance which be- 
comes a violet coloured gas by heat, - - 74 
D 
Davy, Sir Humphry. An account of some new experi- 
ments on the fluoric compounds ; with some observations 
on other objects of chemical inqui ry, - - 62 
Some experiments and observations 
on a new substance which becomes a violet coloured gas 
by heat, - - “ - 74 
■ — " Further experiments and observa- 
tions on iodine, - - - - 487 
— " ■ ■ ' - ' ' Some experiments on the combus- 
tion of the diamond, and other carbonaceous substances, 557 
Da VY, John, M. D. An account of some experiments on 
animal heat, - 590 
Decks, on the mode of laying the planks of them, 332 
Diamond, some experiments on the combustion of it, and of 
other carbonaceous substances, - - 557 
proved by experiment to afford no other substance 
by its combustion than pure carbonic acid gas, - 566 
Distillation, double, on the means of producing it by the same heat, 587 
E 
Electro-chemical phenomena, Bakerian lecture on some new, 51 
Elliptical coloured rings, produced by depolarising crystals, 202 
MDCCCXIV. 4 K 
