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Mr. Hatchett’s analytical Experiments 
Shell Lac. 
100 grains of shell lac, treated as above, yielded, 
1. Acidulated water - 6. 
2. Butyraceous oil - 65. 
3. Spongy coal - 7.50 
4. Mixed gas, amounting by estimation to - 21.50 
100. 
The coal of the shell lac, by incineration, afforded about one 
grain of ashes, which contained a muriate, probably of soda, 
and a little iron, with some particles of sand, which may be re- 
garded as extraneous. 
Analysis of Stick Lac. 
A. 200 grains of stick lac, picked and reduced to powder, 
were digested in a pint and a half of boiling distilled water 
during 12 hours. The liquor was transparent, and of a beautiful 
deep red ; this was decanted into another vessel ; and the opera- 
tion was repeated, with fresh portions of water, until it ceased 
to be tinged ; the lac then appeared of a pale yellowish-brown 
colour. 
The whole of the aqueous solution being evaporated, left a 
deep red substance, which possessed the general properties of 
vegetable extract, and weighed 18 grains. 
B. The dried lac was digested for 48 hours, without heat, in 
eighteen ounces of alcohol ; and the clear tincture being cau- 
tiously decanted, different portions of alcohol were added, and the 
digestion was repeated, until the alcohol ceased to produce any 
effect. 
