540 
Book II. 
Weight of 
water at 
400 
APPENDIX. 
Neither sulphurous, nitric, nor muriatic acids, alter it 
when passed with it through a red-hot tube. Four 
parts of oxy-muriatic gas left with one of carbonic acid 
gas decompose it completely; carbonic acid is formed, 
and a substance like wax makes its appearance. 
Nitrous gas has no effect on it. When mixed with 
sulphurated hydrogen gas, and passed through a red 
hot tube, sulphur is deposited, and sulphurated hydro 
gen gas remains mixed with carbonic oxide gas *. 
SEcr.II. Or WATER, Vol. I. p. 477. 
FRoM the experiments of Lefevre Gineau, performed 
with great câre, in order to ascertain the weight of the 
kilogramme, it follows, that at the temperature of 40°, 
at which temperature the density of water is a maxi 
mum, a French cubic foot of distilled water weighs 
volbs. and 223 grains French — 529452.9492 grains 
troy†. Consequently an English cubic foot at the 
same temperature weighs 437102.4946 grains troy, or 
999.0914161 ounces avoirdupois. 
Boox II.—CHaP. IV. OF AcIDs, Vol. II. p. 1. 
Two additions have been made to our knowledge of 
these bodies. 1. Sulphuric acid has been analysed by 
Mr Chenevix—2. Sebacic acid has been examined by 
Mr Thenart. 
X Ann. de Chim. XXXiX. 26. 
Jour. de Phys. xlix. 171.