Joins chemical 'Experiments on Tabaflieer* ^77 
the glaffes containing them were inverted without their 
falling out. 
This change into jelly equally took place whether the mix- 
tures were kept in open or clofed vefiels, were expofed to the 
light, or fecluded from it; nor did it feem to be much pro- 
moted by boiling the mixtures. 
(G) Some folution of mild volatile alkali in diftilled water, 
being added to fome of this folution, feemed at the fir ft inftant 
of mixture to have no effect upon it j but in the fpace of a 
fecond or two it occafioned a copious white precipitate. 
(H) The flakes remaining on the glafles at (D) and (E) put 
into marine acid raifed a flight effervefcence, but did not difi* 
folvei Thefe flakes, when taken out of the acid, and well 
Waftied, were found, like the original Tabaflieer, to be white 
and opaque when dry ; but to become tranfparent when 
moiftened, and then to (hew the blue and flame colour, 
§ 11 . (A). 
(I) The jellies (F), diluted with water, and collected on a 
filter, appeared to be the Tabaflieer unchanged. 
§ X. A bit of Tabaflieer, weighing two-tenths of a grain, was 
boiled in 127 gr. of ftrong cauftic volatile alkali for a con- 
fiderable time ; but after being made red hot, it had not 
fuftained the leaft diminution of weight. 
§ XI. (A) 27 gr. of Tabaflieer, reduced to fine powder. 
Were put into an open tin veflel with 100 gr. of cryftals of 
foda, and fome diftilled water, and this mixture was made boil 
for three hours. The clear liquor was then poured off, and 
the Tabaflieer was digefted in fome pure marine acid ; after 
fome time this acid was decanted, and the Tabaflieer waflied 
with diftilled water, which was then added to the acid. 
Vql. LXXXI. Ddd (B) This 
