( ti57 ) 
After thefe Obfervations I talked with the Man ♦•■\^ t 
fells Colours, or the Materials for Dying, where this Su>'ie 
is alfo ro be bought 5 who told me that it was true that 
the Pumice-ftone is found floating upon the Sea, but that 
there are no whole Rocks of thofe Stones, and that 
Spunges grow upon them. 
Now, if what he affirmed is true, I irnagin that fomc 
common Salt, otherways calTd Sea Salt, v/oald be found 
in forae of the Pores of this Stone; to farisfy my 
felf therein, I took a piece of Scone about the bignefs of 
the fop of my Finger, and laid it opon fome Wo3d*coal 
till it was glowing hoc, and then threw it into clean 
Rain Water, imagining it would finb to the bottom 5 
but I was deceived in my ^xpeftation, for mofl: of the 
Water had infinuated itfelf into tile Pores or Pipes of the 
Stone. 
After this tryal I took the Particles of the Stone that 
was broke to pieces in the Water, and laid them upon a 
dean piece of Paper, and then put thofe piec^es into Wa- 
ter again, in order to impregnate ft with the Salt Particles 
that were in the Stone ^ then I placed fome oi the Water 
upon four difnnft Glafs Plates/ and -when it^^was almofr 
evaporated I could perceive a grcwit number of Sah Par- 
ticles, whofe Bafis was an exaft fquare, all the tour fides 
of which afcended Pyramidically,the Superficies of others, 
which could be but jaft perceived by the help of a good 
Microfcope, was a very fmall fquare, refembling the Co- 
agulations of our Common Salt 5 and as our common Salt 
in moift Weather becomes Mquid, fo alfo did thefe 5 but 
fo foon as it was fair and dry Weather again, the Watty 
Parts cxhaFd, and the Salts refumed theii^ former figure : 
ITa;w likewife amongft them fome Particles that wete 
Gommon Salt. 
Now, I don't doubt bur that m^arfy of thefe? Pumicb- 
ftoties are found in the Sea 5 for having viewed feveral of 
G gggggggggggg • tix^^ 
