C 2418 ) 
ceiv’d that it was nothing elfe but the coagulated Salt Par- 
ticles, the figures of which at that time I could not dif- 
cover 5 from whence I concluded, that the Salts, of 
which Pearls are partly compofed, cannot be diflblved 
but by a violent Fire, or in ftrong Waters, and that that 
Heat that 1 had brought upon the Pearls , when they 
were in the Glafs Tube , was not ftrong enough to fe- 
parate the Salt Particles. 
I took a drop of Water, which was very clear, from 
under that Scum that I told you before was compofed of 
the Salts of Pearls , and 1 put the fame upon a clean Glafs, 
and obferved in the fpace of two Minutes, that there, 
was, as it were, a new Scum drawn over the laid Wa- 
fer. 
The nest Day this Water was wholly evaporated, and 
where it had lain thickeft, there was nothing to be feem 
but a white Matter, as it appeared to the naked Eye, but 
in reality, there was an incredible number of exceeding 
fmall Salt Particles, which for the moft part were fo 
ftrongly coagulated, that there could be no particular Fi- 
gure difcovered in them, but where the Water had lain 
thinner, there the Salt Particles were coagulated in the 
form of Boughs and Branches of Trees. 
Now, forafmuch as the Water, in which thofe burnt 
Pearls lay, was moftly evaporated, I put fome frefh Wa- 
ter upon them to try whether the Salts would not coagu- 
late in larger Figures. 
After this Water had been about a Minutes time poured 
upon the Pearl Particles, and that I judged them to be 
funk to the bottom, the Superficies of the fame Water 
was again covered with another Scum. 
I then took a little of that Water alfo, as clear as I 
could, from under the Superficies of it, and put a little 
thereof upon two very clean Glaffe^, and prefently dif- 
cover’d a new Scam fpreading over the fame, which sc- 
