ae. 
Chemistry and Physics. 99 
it is to be strongly pressed between folds of bibulous paper, and then 
freed from volatile products by long fusion. In this way it is obtained 
0 
of sulphuric acid, which, although involving no new principle, promise 
to be of great importance in a manufacturing point of view. The ac- 
lannic acid is a copulate of sugar and gallic acid. Tannic acid was 
boiled with dilute sulphuric acid, the solution was neutralized with car- 
bonate of lead and then precipitated with acetate of lead: after the re- 
tannic acid into gallic acid and sugar is then represen 
CsoHisO2 s-+-10HO=2(C14Hs012)4+-C12H 12012. 
—Ann. der Chemie und Pharmacie, \xxxi, 248. 
oi 
