E9^3 I 
An ExtraSi of a Letter from Mr. Anthony Leewen-* 
hoeckF.qT the R-S. to a of the R. Society, Dat- 
ed from Delf, January ^th. 1685. 
Concerning the Salts 0/ Wine and Vinegar , isrc. 
T Hough I have often excufed my felf, from examin- 
ing the various figures of 6'^/i^j',partly fuppofing it 
would be too much labour to me, and more efpecially 
becaufe in fome Attempts of that nature, I formerly had 
no Succefs s The Warmnefs, or Coldnefsof the Air, caul- 
ing great differences in the fliapes df the Salts never*- 
thelefs, by lighting on a new Method, I have been en» 
couraged to make the following Obfervations, 
Having found my yearly provifion of Vinegar ( which 
had layn about ^ Months in my Cellar,] to be more four 
then ordinary, I left it open to the Air, during fome 
hours, at which time I obferv'd a very great many parti- 
cles (which I call the Salt otth^ Vinegar^ as Numb.-i Fig. 
ji. tapering towards' each end, and having in the mid- 
dle a loHg browniih Figure : other of the fame extent as 
Fig, 5. being as clear as Chryftal ; and thefe were the 
moft numerous others being long and brownifli, which 
had in the middle of them, a bright clear fubftance, as 
Fig. C In another place, were fome few oval figures, 
within which were contained fome leflTer ovals, as 
Fig. D. Under the aforefaid iTgi^r^j-. jiBC, I thought I 
fawmany that had a HollowneS within them, like that 
of a Boat; fometimes one of the aforefaid figures, has 
appeared to me, with the one half brown, and the other 
part clear; fometimes one of the^^i^r^j- hath layn a, 
thwart another, as at Sometimes there v^ert figures^ 
which fcemed to have beea cut in two, each of them re- 
prefentingbutonehalfof ^5, or^", asf- Many of thefe 
aforefaid figures werefo fmall, asfcarce to befeen,boc 
V, 3 withall 
