[ 3'8 3 
I preierved fomc Plants with their natural Earth, and 
brought them to London alive ^ and I obferved the 
lemaikable Change produced by the Sun’s Heat on 
them; for the faline Matter in Greenlandy which 
certainly was analogous to a fix’d Salt, became, in a 
Month’s time, almoft to the fame Volatility as that 
which naturally grows in England. 
This I make mention of, in cafe other Gentlemen, 
who have had the fame Opportunity, have been 
remifs in their Curiofity. 
^a^id NicoJfon, 
VI. A Letter from Edmund Stone, F. R. S. 
fo — concerning t^wo Species of Lines 
of the Third Order, not mentioned hy Sir 
Ifaac Newton, nor Mr. Sterling. 
SIR, July 31. 173^. 
H AVIN G for feme time paft been reading and 
confidering the little Treatife.of Sir Ifaac 
Newton, intituled, Enunieratio Linearum tertii Or- 
dinis, as alfo the ingenious Piece of Mr. Sterlings 
called, Illuflratio Tra£latus Domini Newtoni Line- 
arum tertii Ordinis-, I have obferved, that they have 
neither of them taken Notice of the two following 
Species of Lines of the Third Order ,• and venture to 
affirm, that the Seventy-two Species mentioned by 
Sir IJaac, together with the Four more of Mr. 
Sterling, and thefe Two, making in all Seventy- 
eightj is the exa61: Number of the different Species 
