144 
SELECTED ARTICLES. 
II. 0.650 of the same produced by combustion 0.200 of 
water and 0.898 of carbonic acid. 
From these data this salt is composed of, 
Theory. 
Theory. 
Analysis. 
C 28 
1070.16 
40.93 
41.15* 
H 14 
87.36 
3.34 
3.41 
O 6 
600.00 
22.96 
32.57 
Ba 
856.88 
32.77 
32.87 
2614.40 
100.00 
100.00 
To agree with these results, the salicide of barium should 
contain two atoms of water of crystallization. To confirm this 
in a direct manner, I determined the amount of loss which 
the salt underwent by a heat of 160° in a current of dry air 
by means of the drying apparatus of M. Liebig. 
1.237 of salicide of barium, dried in this manner, lost 0.110. 
This gives for the hundreth — 
Theory. Analysis. 
C 28 H 10 O 4 +Ba=2389.44 91.4 91.2 
2Aq=224.96 8.6 8.8 
2614.40 100.0 100.0 
Salicide of Copper. — The best process for obtaining this, 
consists in agitating a solution of hyduret of salicyle to which 
recently precipitated hydrate of copper has been added. As 
soon as the hydrate of copper enters the solution, it changes 
to a beautiful grass green. This combination is to be thrown 
upon a filter, washed with alcohol and dried upon a salt water 
bath. In this state the salicide of copper appears under 
the form of a green powder, very light, of a slight cupreous 
and aromatic taste, insoluble in water and alcohol. When 
heated on platinum foil, in contact with the air, it gives off 
abundant white vapors, of which a part, condensing on the 
♦The quantity of carbon given by analysis was but 38.22, but we must 
add to this quantity that which is retained by the baryta as a carbonate. 
This latter is equal to 2.23, and the total of carbon will be 41. 15. 
