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fait, when infufed for fome time in water : and as 
hempfeed is known to be an efficacious medicine in 
fome particular cafes, thefe experiments may demand 
a ftridicr enquiry from the profeffiors of phyfic, which 
may poffibly turn to the benefit of mankind. 
Experiment L 
On the 25th of February lad, I put half an ounce' 
of hempfeed to about two ounces of New-river water 
in a vial, and covered it clofe with paper, to pre- 
vent the dud coming to it : by the 25th of March) 
it became very putrid, and had thrown up a vifcid 
fcum to the top. Fahrenheit’s thermometer in the 
houfe was, during this time, from about 44 to 52. 
degrees. I examined this fcum with a common mag- 
nifier, of about an inch focus, and could difcover it to> 
be full of regular- fhaped falts, which lay on the 
furface ; fome of a fquare, others of an oblong: 
figure. 
Applying fome of the fcum to a dip of glafs, I 
placed it in the fingle or Wilfon’s microfcope, mak- 
ing ufe of the fourth magnifier, and it exhibited tho 
crydals reprefented before dg. 7 j but as the dirring 
of the fcum had obfcured the precife figure of the 
falts, I applied a hair pencil to them, dipt in dean,, 
river water, and. feparated them from the mucilage 
that ha'd befm eared them^ yet, notwithdanding this 
addition of water, their figures were not in . the lead 
impaired or melted, but their outlines were rathen 
more exadly defined. Nor were the millions of ini- 
VoL. LIX* U Bute 
