86 W. P. Dexter on the Sulphates of Antimony. 
have obtained in this way a salt in small needles, but which 
was not ana. : 
duction of an amorphous substance. hen brought upon 
filter and washed copiously with boiling water, the filtrate co” 
tained constantly a little sulphuric acid and deposited oxyd 
antimony on cooling. From the agreement of the result of 
their analysis with the calculated composition, it would see? 
that in the crystalline state, this salt is not decomposed, or is but 
weed ri eae he water. 0°8334 of the salt - ; 
in way, and dried by pressure in paper, gave 0°8393 50: 
and 0:2735 a8, a ord x 
Calculated. Found. 
28b0, 85°66 86°52 
so, 11:71 11:27 
HO 2-63 (2-21) 
100-00 100-00 
Brandes found in the salt 3 p.c. of water. Péligot ob- 
tained it water free, and also with two atoms of water. eat 
to 100° it lost one half p.c. ; the rest of the water requir 
ee expulsion a temperature above 
The 
drate of sulphuric acid to form an acid sulphate,* 
most basic compound of both contains two equivalents of ee 
to one of acid. In place of a bisulphate, they have salts W" 
three atoms of acid to two of the earths, and no intermedia” 
salt, like that of antimony, has yet been discovered. ge 
* Zirconia, Berzeli i i i jus, 
ee Gioetmiats us, but perhaps not quite certain—glucina, Berzelius, 
