57 
And the salt was subjected to organic combustion. Nitro- 
gen was determined by Dumas’ method. 
The following numbers were obtained as the mean 
results : — 
Carbon 2 6 ’9 3 
Hydrogen 4T1 
N0 2 18-44 
PbO 47 42 
Oxygen 3*10 
100-00 
Now I prepared the silver salt of the same and obtained 
18*5 per cent of silver as the result. It seems to give no 
help as to the formula of this body. 
As such was the case, I took alcoholic extract of the original 
lacquer and precipitated it with acetate of lead, and after 
requisite purification and drying the precipitate was 
analysed. Lead determined as before. The following is the 
mean of the results of two experiments which I was only 
able to try : 
Carbon 50 ‘450 
Hydrogen , 5*705 
PbO 3-775 
Oxygen 40-070 
100-000 
(2.) The gum is soluble in cold as well as in warm water. 
It has no smell, almost no taste, it has a yellowish or rather 
brownish colour, and is of a non-crystalline body. It is 
quite insoluble in alcohol. On subjecting this substance to 
organic analysis I got the following percentage of hydrogen, 
carbon, and oxygen : 
I. 
II. 
Carbon 
41-20 
41-45 
Hydrogen 
6-51 
6-58 
Oxygen 
52-29 
51-97 
1C0-00 
100-00 
