[ 147 1 
but full of the cryftals of falts, as reprefented at %. 
12. Some of the firft hempfeed put into the fame 
water produced much fait, but not fo regular in its 
figures ; theie figures, by fome means unknown to 
me, after their cryflallization being broke irregularly 
at their ends, fee fig.’ 13. But yet in this infulion, 
there were many of the original, feminal figured 
fiiJta.. 
Experiment III., 
I was determined to fee what effe6l the hard pump 
water of Gray’s- Inn, after a month’s dry weather,, 
would have on the hempfeed" in infufion particu- 
larly as I was perfuaded from experience, that this 
water contained a large portion of calcareous earth. 
Accordingly, on the 5th of May, I put an ounce 
of the fame hempfeed with the laft which I had ob- 
tained, into four ounces of this pump water; and on 
the I yth of May I perceived the cryftals, which, on 
being put into the microfcope, with the fame magni- 
'fier, gave the appearance reprefented at fig. 14. 
The cryftals of this infufion feemed larger and. 
flatter, and fomething different in their fliape ; but on 
examining the mucilage that lay among the feeds at 
the bottom of the glafs, I found an infinite number 
of the fame fhaped cryfials with thofe I have called 
feminal cryfials which were likewife found in the 
mucilage of the New- river water infufion, and in the 
diftilled water infufion among the feeds. 
I mufi further obferve, that the calcareous earth 
doated in great abundance among the fcurn of 
the pump- water,, as foon as the putrefadion v^as ad- 
U 2 vanced.;. 
