RESEARCHES UPON SALIC1N. 
145 
cold portion of the matter, forms a crystalline sublimate in the 
form of very small plates with an iridiscent reflection. 
The result of a first product gave — 
I. 0.326 of the matter, 0.082 oxide of copper, 
0.466 of the same gave 0.146 water and 0.939 carbonic 
acid. 
A second product yielded — • 
II. 0.310 of the matter left 0.079 oxide of copper. 
0.466 of the same gave 0.144 water and 0.925 carbonic 
acid. 
These results give the following formula : 
Theory, Experiments, 
I. 
ii. 
C 28 
1070.16 
55.50 
55.75 
54.94 
H io 
62.40 
3.24 
347 
3.42 
O 4 
400.00 
20.74 
20.70 
21.30 
Cu 
395.70 
20.52 
20.08 
20.34 
1928.26 
100.00 
100.00 
100.00 
Salicylic */3cid } or Oxide of Salicyle. 
The only mode by which I was able to procure this body 
was by heating the hyduret of salicyle with an excess of po- 
tassa. The mixture becomes at first of a reddish brown, but 
finally loses all color. In the meantime much hydrogen is 
disengaged, as happens with the hyduret of benzule when 
treated in the same manner. When the liberation of the 
hydrogen ceases, the heat is to be withdrawn and the mass 
dissolved in water, and hydrochloric acid added in slight ex- 
cess. The salicylic acid precipitates in crystalline tufts, hav- 
ing every appearance of benzoic acid. On dissolving in hot 
water and cooling, it is obtained in white crystals. 
The salicylic acid is slightly soluble in cold water, more so 
in hot, and very soluble in alcohol and ether. It is volatile 
without decomposition, and sublimes with great facility. In 
vol. v. — no. n. 19 
