Chemistry and Physics. 101 
single reerystallization is perfectly pure. The tannic acid is easily sepa- 
rated from 
zu Wien, xxii, quoted in Journal far prakt. Chemie, 71, p. 414 
%. On some derivatives of gallic acid —N acusaur has instituted at the 
suggestion of Prof. Hlasiwetz and under his direction, a series of experi- 
determine whether ternary radicals can be introduced into the 
molecule of gallic acid. The process employed consisted in heating gallic 
acid with the chlorids of the radicals, acetyl, butyryl, &c. The author 
a four substituted acids, the names and formulas of which are as 
lows :— 
Tetracetyl-gallic acid, Cu + Se ast t Ove, 
Triacetyl-gallic acid, Cis + 0 na O10, 
Dibutyryl-gallic acid, Cu + ogre O10, 
Dibenzoyl-gallic acid, Cu + a O10. 
8. On the combinations of tartaric acid with saccharine matters—In 
arine 
“gar, sorbine, pinite, quercite, and erythroglucine, as well as a com ¢ 
Of glucose and citric iy t woh nod may be prepared and purl 
fied by the following process, Equal weights of tartaric acid and saccha- 
c re 
.@ May be separated by oxalic acid. The author represen 
Hons which seca in the Hepes of the new acids by the simplest pos~ 
rmulas representing the ratio of the ies concerned. These 
: hat, as in the case of alcohol in the sulphovinates, the 
seiarine body minus a certain quantity of water, replaces in the acid a 
irs on of the base necessary to saturate this acid in the isolated state. 
38 probable that, as in the case of the compounds of glycerine, the 
