I’AiiT IV.] PcK.tx Slng : iSute on Burmese Varnish. 29S 
left behind a small quantity of some fatty or oily matter (this was 
not examined), and extracted the last traces of the resinous material 
which were added to (A). The residue from ether was next dissolved 
with a small amount of water, with which it was reduced to a slimy 
liquid state. The solution thus obtained was considerably diluted 
with water and boiled for some time, when a brownish precipitate 
separated out (thus indicating the probable presence of some albu- 
minous matter). Tlie precipitate was filtered off, and filtrate which 
contained the gummy constituents (B) was dried over the water bath 
till its weight was constant. The final residue (C), which was in- 
soluble both in alcohol and in boiling water, was dried at 100°C. 
It was an opaque mass of a dark brownish colour like the insoluble 
constituent of the Japanese lacquer. It was found to contain 
nitrogen, and since the solution of the residue, which contained 
along with it the gummy matter and in which it was present pre- 
sumably in its original soluble form, was precipitated by the action 
of heat, it was eventually inferred that it consisted of some albu- 
minous substance. 
E.r<nninntion of the Alcoholic Extract (4). 
The alcoholic extract dried at 10o°C. was found to be a paste- 
like mass of a dark brown colour. It dissolved readily in benzole, 
ether, chloroform and carbon bisulphide, but was insoluble in 
water. Unlike the original thitsi, it refused to dry up when 
exposed to the action of moist air (see drying experiments belew, 
pp. d04 & 305). Its specific gravity (20°C.) was found to be 0-9863. 
Its alcoholic solution gave the following reactions: — 
Silver nitrate produced a dark precipitate, which on boiling 
deposited a shining mirror of silver on the sides of the tube. 
With platinum chloride a gelatinous black precipitate was ob- 
tained, which on standing collected down to a pasty mass at the 
bottom of the tube. 
On adding copper nitrate, a black colouration was produced in 
the alcoholic solution from which the copper salt separated in a 
finely divided condition on the addition of a large quantity of water. 
The alcoholic extract was slowly dried at 105-1 10°r., to a con- 
stant weijrht, and analvsed with the following results : — 
O' 1616 gram of the substance gave 0'4556 gram CO, and 
