Richards and Palmer—Antimony Tannate. 361 
Art, XLITIL.—Notes on Antimony Tannate. No. 11; by ELLEN 
SwaLLow RicHArps and Atice W. PALMER. 
RS gr Rg ae eae Sra en Cag te ete ng eae 00 
Sample of ground hemlock-bark from Vermont .-.-... -.----- 7-07 
Pemore OF Satechu .... 5 i ee ee oe 29°70 
mamiple Gf king... Tee Pi ea foe 41°50 
Crushed quercitrow bark. .....5... .ic. fio si ee OO 
Rs tent SOIR Ge ee A, 4°60 
eae ey ee ee eee hone ee ee 9°60 
RO Clive ee a 7-03 
Chestnut-oak from Careyville, Tenn......--------------- 3°00 
We also prepared a quantity of antimony-tannate from each 
of these substances in the same manner as we had prepared it 
at commercial tannin and sumac. The composition is given 
ows: 
53 oll Sb. Cc. H. 
Per cent. Per cent. Per cent. 
5°09 3°40 
Sweet-fern (May) 15°30 45°0 
Sweet-fern (July) ...-..-.-.-- 15°06 44°90 3°90 
Quercitron .__- 12-80 49°50 342 4 
Sneitnitoak: 2. ee 15°50 A751 3°63 
be OR i a oes ee 12°50 43°30 3°09 
Hemlock-bark, No. I. ..--.--- 13°60 51°02 3°85 
emlock-bark, No. IL. .--.--- 13°50 49°86 
itech 2 eee. 13°70 51°13 3°84 
ee 15-00 50°71 3°72 
Simcha flava... foo 11°20 53°56 4°56 
Coen teak ee 11-40 = 47°30 4:00 
These analyses showed that the composition of the precipitate 
was influenced by one of two causes: either the formula of the 
So-called tannin which united with the antimony contained 
more C and H than di-gallic acid,—that is, it must be some- 
thing like SbOC,,H530;; or Sb(Cas5H_,012)s— or the antimony- 
nnate, which was formed in the solution, acted as a mordant, 
and carried down with it coloring matters which might or 
eh hee not affect the titration, but which did affect the com- 
ustion. 
., lo determine how far this latter cause could be held respon- 
sible, we prepared antimony tannate from the sample of tannin 
