158 
SELECTED ARTICLES. 
I determined the quantity of oxide in the salicinate of lead 
by the process of Berzelius, and burnt another part with oxide 
of copper. The results were — 
I. II. III. iv. v. 
Carbon 60.57 60.16 60.02 
Hydrogen 5.68 5.93 5.88 5.08 5.07 - 
Oxygen 33.75 33.91 34.10 « " 
100.00 100.00 100.00 
I determined the quantity of oxide of lead on four different 
products : 
I. II. in. IV. 
Salicinate of lead 0.612 0.689 0.601 0.543 
Oxide of lead 0.167 0.23S 0.223 0.044 
Metallic lead 0.205 0.187 0.148 0.272 
From which data one hundred parts of salicinate contains: 
I. II. III. IV. 
Oxide of lead 63.36 63.40 63.03 62.06 
As one hundred parts of anhydrous salicin contain 33.92 
of oxygen, the proportion of the oxygen in the anhydrous 
salicin is to that in the oxide of lead, as 33.92 is to 12.25, or 
nearly 3 to 1. 
If this be admitted as the true proportion, the formula for 
salcinate of lead would be C 14 H 8 3 + PbO. 
But the quantity of water replaced by the inorganic oxide 
would not be in a simple atomic ratio with the oxide of lead, 
therefore to avoid fractions of atoms it is necessary to con- 
sider the salicinate as a tribasic salt, having for its formula 
C 42 H 24 9 + 3 PbO. Then the formula of anhydrous salicin is 
C 42 H 24 9 and the crys tallized salicin H 28 O n . 
Jlction of Jlcids. 
The action of acids upon salicin has been partially studied 
by Braconnot. This chemist found that when salicin was dis- 
solved in hot water, acidulated with sulphuric acid, there was 
deposited on cooling, a matter which, from the form of its cry- 
