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vunced j which did not appear on the furface of the 
dirtilled water, and fcarcely any on the river water. 
The grains of fait produced in thefe experiments 
were about the fize of the fineft bafket fait, and of a 
pale yellowiili colour when dry. 
Gray’s-Inn, 
May 24, 1769. 
POSTSCRIPT. 
I have fince found the fame kind of cryftals 
in an infufion of flax-feed in New-river water, 
and alfo in wheat that has been infufed in boiling 
hot water ; but the cryftals were fewer, a-nd did 
not appear fo foon in the flax-feed as in the hemp- 
feed. And the experiment of wheat infufed in boil- 
ing hot water does not always fucceed. 
I have likewife found falts not unlike thofe of the 
hempfeed, in infufions of a variety of pulfe and grain 
from the Eafl: Indies, fuch as lupines, kidney-beans, 
vetches, millet, Guinea-corn, and the fefamum or oily 
grain : but the lafl; yielded a much larger quantity of 
lalt, and in a fhorter time, than any of the refl. 
The falts of thefe different fubftances were alfo not 
diflhlvable upon applying clean water to them ; but by 
letting the infufions continue to putrefy fome weeks 
longer, they by degrees aflumed irregular fliapes, and 
difappeared. I mufl; conclude, then, w'ith this quere, 
Are not thefe the oily parts of the vegetables, which 
float in the feum, on the furface of the infufion, 
crvflallized ? 
Explan a' 
