216 W. Gibbs—Contributions to Chemistry. 
tapering at one end and dilated in the middle to a sort of bulb, 
and the precipitated sulphid of antimony after drying was ig- 
nited in the filter tube itself in a current of carbonic acid gas. 
This form of funnel, which is due to Mr. Taylor, will be found 
very advantageous. A small common funnel may be inse 
into the top, and after drying, the tube funnel closed with a cork 
in weighing. 
§ 5. On the estimation of manganese as pyrophosphate. 
; ? 
near the boiling point of the liquid for an hour after it has be. 
come crystalline. The ammonia-phosphate may then be filtered 
off and washed with hot water. The washing takes place = 
ary facility on account of the crystalline character 
the salt. The orthophosphate after drying and ignition yields 
cero one of manganese as a nearly white powder. In 
- 0'9555 gr. MnSO, gave 0:8985 gr. PO, Mn, = 46°68 pc 30 
= ers o> “ 10717 gr“ —4667 “ | 
: ees “ 07646 pr = 4663 “ 
: gr (Chauvenel 
* Bull. de la Société Chimique. Nouvelle Série ii, p. 11. 
t Ann, der Chemie und Pharmacie, vil, — 
