INDEX 
page 
Henry, William, M. D. On the aeriform compounds of 
charcoal and hydrogen ; with an account of some addi- 
tional experiments on the gases from oil and from coal, 136 
Herculaneum, some observations and experiments on the 
papyri found in the ruins of that place, - - 191 
Herschel, J. F. W. Esq. On the aberrations of compound 
lenses and object-glasses, - 222 
On the separation of iron from 
other metals, - - 293 
Home, Sir Everard, Bart. On the black rete mucosum 
of the Negro, being a defence against the scorching 
effect of fhe sun’s rays, - - 1 
Croonian Lecture. Microsco- 
pical observations on the following subjects : on the 
Brain and Nerves ; showing that thp 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. 25 
An account of the skeletons 
of the dugong, two-horned rhinoceros, and tapir of Su- 
matra, sent to England by Sir Thomas Stamford 
Raffles, - - - 268 
— On the peculiarities that distin- 
guish the manatee of the West Indies from the dugong 
of the East Indian Seas, - - - - 390 
Hutton, Dr. Charles. On the mean density of the 
earth, - - - - - 276 
I 
Iodine , Carbon , and Hydrogen, a new compound of these 
substances described, - - 72 
Iron, on the separation of it from other metals, - 293 
in what manner it may be separated from uranium, 2 99 
— — - on the effects produced in the rates of chronometers 
by the proximity of masses of that metal, - - 361 
K 
Kater, Captain Henry. An account of the comparison 
of various British standards of linear measure, - 75 
— — The Bakerian Lecture : on 
the best kind of steel and form for a compass needle, 
104 
