508 
INDEX. 
D. 
Daniell (J. Frederick, Esq.). Further experiments with a new register-pyrometer for 
measuring the expansion of solids, 443. 
Davy (Edmund, Esq.). On a simple electro-chemical method of ascertaining the presence 
of different metals; applied to detect minute quantities of metallic poisons, 147. 
Dip observations, Kraft’s formula for connecting with each other, 100. 
E. 
Earth {the), considered by Biot as a magnet, 99. 
Electricity { atmospheric ), on the chemical action of, 165. 
Elliptic transcendents, on the theory of, 349. 
Encke, his comet seen at Rio de Janeiro, June 7th, 1822, 7- 
Equinoxes, on the precession of the, 19. 
• {on the precession of), supposing the earth to revolve in a resisting medium, 279. 
F. 
Faraday (M. Esq.). On a peculiar class of acoustical figures; and on certain forms 
assumed by groups of particles upon vibrating elastic surfaces, 299. 
appendix to his paper on acoustical figures, &c., 319. 
Figures { acoustical ), on a peculiar class of, &c., 299. 
Fluid, the equilibrium of a homogeneous mass of, entirely at liberty, when the accelerating 
forces are known functions of the coordinates of their point of action, — problem to de- 
termine, 122. 
the equilibrium of a homogeneous, entirely at liberty, the particles attracting one 
another with a force inversely proportional to the square of the distance, at the same 
time that they are urged by a centrifugal force, caused by a rotation about an axis, 
— problem to determine, 128. 
Fluids, on the equilibrium of, 109. 
equilibrium of, not exactly determinable by Clairaut’s theory, 121. 
theory of the equilibrium of, applied to the question of the figure of the planets, 121. 
on the friction and resistance of, 423. 
Fox (Robert Were). On the variable intensity of terrestrial magnetism, and the influence 
of the aurora borealis upon it, 199. 
G. 
Gilbert (Davies, Esq.). On the nature of negative and imaginary quantities, 91. 
A table for facilitating the computations relative to suspension 
bridges, 341. 
