( i857 ) 
did before. For my farther fatisfadion, whether it waif 
not moftly fixt Salt, I have made two Experiments, by 
putting about the bignefs of a Pea of this Matter on a 
piece of Charcoal, upon which I bl^w the Flame of a 
thick Candle, till the faid Vitrified Subftance began to 
melt, and then I let it drop into a fmall Copper Veffel, 
wherein there was about half a Thimble-full of clean 
Rain Water. This ftufF coming into the Water, with a 
little ftirringdiflblved like Powder or Brick Duft. Where- 
upon I thought that a great many Salt Particles would 
Incorporate themfelves with the Water. After the Wa- 
ter had ftood fome minutes, I skimm'd off fome of the 
top of the Water, and placed it on eight or ten feveral 
very clear GlalTes, and not above a drop of Water upon 
each of them 5 and I faw, when the Water was very 
near wafted, a great many Salt Particles remaining; of 
very various figures 3 among which there were feveral 
whcfe Superficies was an exad Square, a few others were 
Triangular; and others again were Hexangular and Long, 
which, in proportion to their exceeding fmallnefs, were 
very thick 5 fo that they look'd like little pieces of Cry- 
ftal, as they appeared to us with the naked Eye, which 
was no unpleafant fpeftacle, I fa w moreover long Par- 
ticles, but very few, which refembled the fmall Particle? 
of Salt Petre. I faw alfo feveral Particles which were 
broad in the middle and narrow at both ends ^ but I did 
not always fee of this laft fort, which were fo thin, that 
they appeared like fhadows to my Eyes. Befides the 
abovementioned Salt Particles, there were an unfpeakablg 
great number of others, which were fo fmall, that I could 
not difcover their figure 5 but thofe that were a little 
bigger than the reft had fome fort of figures: From 
whence I concluded, that the remainder alfo were Sak 
Particles,befides,where wefawoneofthefc ^Great Salts ly- 
ing, Underfland by the Great Salt Particles that we mean 
only fncb a magnitude as amounts to the Thoufa^tdth part of 
a- 
