were never fo fruitful, could invent fuch a jRunjber of 
Figures, or trace them upon Paper ^ as I there faw^ and 
they were fo very fmall, that feveral Thoufands of 'eni 
together could not equal the magnitude of a fingle grain 
of Sand 5 and forafnuich 2s a very great many of em were 
long, I fancy'd tomyXelf that that Figure might be pecu- 
liar to t hem, and that all the reft had only afliimed a bor- 
rowed form,^ which might be determined by the different 
manner of their unitiog or coagulating in feveral places. 
I let the Water ftand upon the fo called Chalky Sub- 
ftance a few days till it was all evaporated'^ and then I 
difcovered a great number of very fruall fhiniog Particles 
lying at the bottom of the Copper Veffclj into Vvbich I 
had put the faid matter 5 all which I took out as clear as I 
could, and placed them on three feveral clean Glaflb, 
aud then viewing 'em with a Microfcope, my wonder was 
much greater 5 for i did not only obferve fo very diffe« 
rent Figures,- t!iat no two of em were like each other^ but 
they were all of them as clear and bright as Cryftal, yea^ 
fome of them had as fine and regular points as a v/rooght 
Diamond, ' tho' above a thcofand - times fnialler than a 
courfe Sand. 
Among otherSg ■ there appeared to me loch a Triple- . 
jointed Body as is defcribed by Fig» 8. X Y Z, which f" 
alfo endeavoured to feparate by its JoyotSj buti could not 
fucceed^in this neither. 
I Liid this too upon a Wood Coal to make it glowing 
hot^ as I had done the other, but a good part of it buift 
away when it was but juft warm, and as it began to be 
hotter, it made fuch a buftle, that if I had proceeded far- 
ther, i iliould have kept none of it ^ whereupon I took 
a Glafs Tube above a hands breadth long, and hermeti- 
callyfealed atone end, into which I put what remained 
of the above-mentioned Figure, and then heating that 
end of the Tube, the faid Matter burft with great vio* 
knee into iuch fmall Particles^ that many of them feemed 
