337 
formerly supposed io be Zeolite, &c. 
redissolving this salt in distilled water a minute portion of 
earthy matter was separated, which, after cdulcoration, was 
added to the rest. The fluid from which it had been separated, 
and the edulcorating water, were again evaporated to dryness, 
and the ammoniacal salt expelled by heat, in a platina crucible. 
( 5. ) After the crucible had been made red hot, it was exa- 
mined. I discovered on the bottom of it, some traces of earthy 
matter, and some spots, which had a glassy appearance. 
Water boiled upon it, dissolved nothing ; from which circum- 
stance, the absence of both of the fixed alkaline salts may be 
inferred. Neither did nitric acid produce any alteration. A few 
drops of sulphuric acid effected a solution of the substance, 
which adhered to the bottom of the crucible. Ammonia preci- 
pitated from it a small quantity of earth, which was transferred 
to the rest, and the sulphate of ammonia and edulcorating 
water were again evaporated and expelled by heat. A few 
spots of the same glazing still appeared. I had observed the 
same phenomenon in a former experiment: but in that, as 
well as in the present instance, the substance was in too small 
a quantity to become the subject of experiment. 
D. 
(1. ) Upon the precipitate (C 1 ), and the earths collected at 
different times, whilst they were in a moist state, I poured a 
solution of potash in alcohol mixed with distilled water ; in 
a short time, the greater part of it was dissolved. 
The clear solution was decanted, and the undissolved sedi- 
ment was transferred to a bason of pure silver, and boiled with 
a solution of potash. 
( 2. ) When the potash ceased to act upon it, it was diluted 
mdcccv. X x 
