( 4° ) 
and even while it is palling, there rifes Flower?, or 
a volatile Salt in very beautiful foliated Lamina \ 
fome of which melt by the Heat of the Fire. Af- 
ter the Operation, the fined: of rliefe Flowers, which 
are round the Neck of the Retort, are gathered ; and 
thofe that are grey, are thrown upon the remaining 
Mafs : which Mafs is difTolved in Water, filtrated, 
and evaporated flowly. Sometimes, even without E- 
vaporation, the Ihining Talcous Laminae are to be 
feen in the Liquor. In 24 Hours the Liquor is pour- 
ed off thefe Laminfi : they are walhed in fair Wa- 
ter, fet to drain, and then to dry in a Stove. 
If thefe Cryjlals do net calcine in the Stove, or in 
the Sun, ’tis a Sign there is nothing cryftallized but 
the Sal neutrum : if they do calcine, ’tis a Sign that 
there is fome Glauber’s Salt mixed. . And then this 
Salt mull be difTolved again in hot Water, and re- 
cryftallized. No body before me has thought of 
extracting this Salt by Cryftallization : It was always 
fublimed hitherto. 
fruited for W. Inny s and R. Manby, Printers 
to the Royal Society., at the W eft-End of St. Rauls , 
mdccxxxvj. 
