Leriher—Gravimetric Determination of Tellurium. 1285 
of a 15 per cent solution of hydrazine hydrochloride, and again 
25 cc. of a saturated solution of sulphur dioxide. The boiling 
is continued until the precipitate settles in such a way that it 
can he easily washed. This boiling should not take more than 
five minutes. The precipitated tellurium after being allowed 
to settle is washed with hot water on a Gooch filter until all of 
the chlorine is removed after which the water is displaced by 
alcohol and the crucible and contents dried at 105°. 
