INDEX. 
Colours, blue , on those used by the Ancients, - 105 
. green, on those used by ditto, - • - 109 
> ■ ■ purple , on those used by ditto, - 112 
red, on those used by ditto, - - 101 
while, on those used by ditto, - - 118 
yellow, on those used by ditto, - - 104 
on the manner in which the Ancients applied them, 118 
— on some phenomena of them exhibited by thin plates, 161 
Current, some observations on that which often prevails to 
the westward of the Scilly islands, - - 182 
D 
Davy, Sir Humphry. Some experiments and observations 
on the colours used in painting by the Ancients, - 97 
— Some experiments on a solid com- 
pound of iodine and oxygene, and on its chemical agencies, 203 
- On the action of acids on the salts 
usually called hyperoxymuriates, and on the gases pro- 
duced from them, - - - 214 
Do novan, M., Esq. On the nature and combinations of a 
newly discovered acid ; with observations on the malic 
acid, and suggestions on the state in which acids may have 
previously existed in vegetables, - - 231 
E 
Equations, functional , on those of the second and higher 
orders, - 409 
F 
Fishes, experiments to ascertain the influence of the spinal 
marrow on the action of the heart in them, - 91 
Functions, an essay towards the calculus of them, - 389 
arbitrary, on the number of them introduced into 
the complete solution of a functional equation, - 408 
G 
Georgian planet, observations of its satellites, accompanied by 
a theoretical determination of their situation, whereby 
their identity may be ascertained, - - 304 
S N 
MDCCCXV. 
