MicrocRaApuia. 
poflible; a fperical or globular form; which'propriety:and feveralcof the 
Phenomena that proceed from it, Ihave more fully:explicated amthe fixth 
Obfervation. Ls MII 2d yee yods eotelt yasm ml . vi 
~. One Experiment, which does very muchilbhaftrate my prefentExplica- 
tion, and is mit felf exeeeding pretty,»I muft notipafsby : And that is a 
way of making {mall Globules or Balls of Leads :orTin, as fmallalmoftas 
thefe of Iron or Steel, «and: that exceeding eafily and: quickly;,by-turning 
the filings or chips “of thofe Metals alfo ‘into »perfectly round Globules, 
The way, in fhort,as I received it from the Learned Phyfitiam Doffor 1. G, 
isthiss fi dordw.. 0} ates -vidvwotivd  rAtiwsle?, ports 
~ Reduce the Metal you would thus fhape,: intorexceeding fine filings, 
the finer-the filings ares’ the finer will the Balls be : S#ratifethefe filings 
with the fine and well dryed powder of quick'Lime in a Crucible propor- 
tioned tothe quantity you intend tomake: When you have thus filled 
your Crucible, by continual. fratifications of the-filings and; powder, fo 
that.as neeras may be, no one of the filings may. touch another, place the 
Crucible ina gradual fire , and. by degrees let it be! brought to a heat big 
enoughto make all the filings, that are mixt with the quick Lime,to melt, 
and no more 5 for if the fire be too hot, many of»thefe filings. wilh joyn 
and run together ; whereasif the heat be proportioned , upon wathi 
the Lime-dutt in fair Water , all thofe {mall filings.of the Metal will fub- 
fide to the bottom:in a moft curious powder ,:.confifting all of exactly 
pas rte which, ifit be very fine, is very:excellent to make Hour- 
glafles of. 1) Lio aeinidels says bamgaqe at9d3 
- Now though quick Lime be the powder that:this, di omak 
choice of, ‘yetI doubt not; but that there may be much more convenient 
‘ones foundout, one of whichI have made tryal of, and found very effe- 
tual 5 and were it not for difcovering, by the mentioning of it, another 
Secret; which I am not free to impart, I fhould: have here. inferted 
It. iss HG 10. ¥ 
i 1st ba3n3¢ 
bigs BE Pe 
> 
+ : 5 tare rae. 
7 Se 
Obie. IK. Of te Cale eeroabe in Mifoy Gli nd 
......... other thin Bodies. widese elisa ae | 
~~ s 
M Okseyspiawer Lapis Jpecularis,is a Body that feems to have as ma- 
ny Curiofities in its Fabrick as any common’Mineral I have met 
‘with : for firft, Itis tranfparent to a great thicknefs > Next, it is com 
pounded of an infinitenumber of thin flakes joyned or generated one 
‘upon another'{o clofe & {mooth,as with many hundreds of them to make. 
‘one {mooth and thin Plate of a tranfpatent flexible fubftance,whichr with 
care and diligence may be flit into pieces fo exceedingly thin.as to be 
hardly perceivable by the eye, and yet even thofe, which! have thought 
the thinneft,; [have with a good Microfcope found tobe made up of many | 
ether Plates, ‘yet thinner; and itisprobable, that,were our Microfcopes 
much 
» 
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s 5 
