Chemistry. 
191 
Substances. 
Mass of the Mole- 
cules, that of Oxy- 
gen being taken at 
unity. 
Mass of the Mole- 
cules, that of Hy- 
drogen being taken 
at unity. 
Hydrogen, 
0.0624 

Oxygen 
— 
16.026 
W ater, 
1.1248 
18.026 
Azote, 
0.878161 
13.9733 
Chlorine, 
2.2535 
36.124 
Cai'bon, 
0.75392 
12.0823 
Sulphur, 
2.2447 
32.683 
Fluoi'iuin, 
1.125 
18,000 
Borium, 
0.921 
14.700 
Potassium, 
4*89915 
78.400 
Sodium, 
5.8184 
93.000 
Calcium, 
5.1206 
82.000 
Magnesium, 
6.3344 
101.300 
Borium, 
17.1386 
274.000 
Strontium, 
10.946 
175.000 
Silicium, 
1.9761 
31.600 
Aluminum, 
2.2822 
36.200 
Mercury, 
25.316 
405.000 
Silver, 
13.51605 
216.000 
Gold, 
24.86 
398.000 
Platina, 
24.30452 
389.000 
Lead, 
25.8900 
414.000 
Iron, 
6.7843 
108.500 
Copper, 
7.9139 
127.000 
Manganese, 
7.11575 
114.000 
Tungsten, 
24.15378 
386.000 
Zinc, 
8.0645 
129.000 
Molybdena, 
5.968 
95.500 
Antimony, 
8.0645 
129.000 
Arsenium, 
4.70385 
75.000 
20. Application of the Theory qf‘ Determinate Proportions to 
Organic Compounds. — The Chevalier Avogrado has published 
in the same volume of the Turin Memoires, p. 440-507, a me- 
moir entitled Sur la maniere de ramener les composes organiques 
aux loix ordinaires des proportions determinees. In this able 
memoir, which is unsusceptible of abridgment, he treats of bina- 
ry, ternary, aud quaternary combinations, viz. those formed 
either of carbon and hydrogen, such as naphtha ; or carbon, hy- 
drogen, and oxygen, such as sugar, alcohol, ether, and most sub- 
stances of vegetables ; or carbon, hydrogen, oxygen, and azote, 
such as fibrine, usus, uric acid, &c. 
21. Simple Method of liquefying the Gases. — Sir H. Davy 
has recently used a very simple method of liquifying the gases 
hy the application of heat. It consists in placing the gas in one 
leg of a bent sealed tube confined by mercury, and applying 
