INDEX. 
page 
361 
Sublimate, corrosive , is not soluble in the sulphuric and 
nitric acids, as well as in the muriatic acid, 
T 
Thorax , of its motions, as affording a key to the intricacy 
of its nerves, - 285 
Tin , melted, grounds of suspicion that it may contain air, 74 
U 
Vacuum , mercurial, experiments on electrical and magnetic 
repulsions and attractions in it, - - 69 
torricellian, some experiments to ascertain whe- 
ther the diminution of its temperature diminished its 
power of transmitting electricity, - - 71 
Valparaiso, observations of a comet seen there, - 46 
Vapours, the law of the diminution of their density repre- 
sented by a geometrical progression, 70 
Vegetable and animal substances , on the ultimate analysis of 
them, - - - - 457 
Voltaic battery , its influence in obviating the effects of the 
division of the eighth pair of nerves, - - 22 
Ure, Andrew, M. D. On the ultimate analysis of vege- 
table and animal substances, - 457 
W 
Water, on the state of it in cavities found in certain crystals, 367 
Whiston, Mr., his determination of the dip of the mag- 
netic needle in London in 1720, referred to, 19 
Wollaston, William Hyde, M,D. On the concentric 
adjustment of a triple object-glass, 32 
— — — — : — on the finite extent 
89 
of the atmosphere, 
From the Press of 
IF. NICOL, Successor to IF. B ULMER and Co, 
Cleveland-row, St. James’s, 
London. 
