# 
146 Book Notices. 
ee Loewenthal’s* _ with ses wena of iron and —— of potas 
um will reveal the presence of suc! unds of sulphur in chlorhydric acid 
made ro the utmost care, and in other respects pure. By means of chloviae or 
some of su sulphur tg pi dly be oxyd- 
es or en tae the larger part of these wigan perk may ted into sulphu- 
ric acid; whether their last pried can be oxydiz ized in this iis is a point by no 
ns beyond a doubt. But if the hyd d has been treated with chlorine 
f barium 
ting to dryness. The residue was dissulved in distilled ‘tte, and in this solution 4 
slight excess of chlorid of barium was present, as was proved by the sng 
uced by a solution of penaque’ of lime. ae acid free from sulphur 
then prepared by the follo i 
treated with enough cold ‘tear to duaclve alow f of the acid taken, and the 
pee ; 
Id solution thus obtained y aporated ie: crystallized; the mass of 
cry was ed with a saturated solution of ms crystals, and was 
finall ved in distilled n these two calcium 
$5 
and the oxalic acid, so prepared, no sulphur could be detected, either by barium salts, 
Loewenthal’s test, or by the blowpipe reaction on 
“We app ied to every zinc in our possession the following test for sulphur. 10 
ne were intr pee a into a small soap of the solu- 
tion of chlor! id of calcium and of oxalic acid added the ret os drogen gas was freel 
developed, and was as tested for any sl huretted hyd which it pack contain, e 
placing a slip of paper moistened with alkaline acetate ‘of 1ead in the narrow 9 
of the flask. In every case the paper — immediately and strongly coscean 
showing conclusively that every one e following zines contains sulphur in 4 
_ a xtremely minute, but distinctly oars ifa ‘ootiaianily delicate 
a 
1. cars Montagne zine (in two distinet samples). 
ilesian 
The United States Mint zine. 
eB Proves nes sine 
SIOOe Se 
od 
Silesian —e (subjected to Meillet’s} process for purification from arsenic). 
8. w Jersey: zi 
_ 2 us from the Ni bi a 
10, — zine (in ee distinct mye les). ew Jersey white zinc oxyd)- 
ae aia t api oboe e previous obser 
ee eine that sulpbur is not cob- 
tained in eilecidet zine, from the fact eae ers sulphur is 
* Jour. pr. ‘Chem., Ix, 267. 
+ Dingler’s s Polyt. Jour., 1842, Ixxxiii, 205, from Jour. de Pharmacie, 1841, 625. 
= Sse eS es 
