Microarapiray/ 
Pin. Afterwards I view'dit every way with abetter Microfcope, and found 
it omboth fides, andiedg ge-Wways, to refemble the Shell of a rer ad 
Snail with a flat {piral Shell: it had twelve swreathings, ia; h;¢, dye, Bao, 
all. very: proportionab! y growing ‘one Jefs than another’ ‘toward: the 
middie.or center of the Shell, wile thete wasa\very {mall round ‘white 
pot. I could not certainly difcover whether the Shell were hollow.or 
not, but:it feem’'d fill'd sms fomewhat; and ‘tis probable that'it might 
be petrify'd as other larger Shels often aes fies asinine ee dinthe 
Robatleiodfireutiein’ iditogmt 4 Hy: 
1 aud 3 lo 
rr rT TTT 5 ee a Nk ikl TTY yiad 
Obferv X11. oF Gravel in Uriné. 
-Have often obfervid rhe Sand or Gravel ‘of Urine} which feems tobe 
a tartareous fubltance, generated out of a Saline and a terreftrial fub- 
dtance eryfialliz d together, j in the forim of Tartar, fometimes Iticking 
the fides of the Vrizal, but for the moft part finking tothe bottom, 
_ ‘there lying in the form of coorfe common Sand; thefe, through the sade 
peice ict appear to bea company of fall bodies.partly tranfparents and 
opacous, fome White, fome Leek fome ape others of more 
own and dufkie colours: it alorlyve 
The Figure of them is for the moft part flat, iathedadmenohtlaligas 
fach like plated Stones,that is,each of them feem to. be made up of feve- 
ral other thinner Plates, much like Af/covre: Glafi,or Englifh Sparr.to the 
lait of which, the white platet@ravel.feems moft likely 5 forthey-feem 
not onely plated like that, but th&ir Ades fhap'd alfo into Rhombs, Rhom- 
doecids and fometimesinto Reéfangles and squares. Their bignefs and Fi gure 
inay be feen in the fecond Figure of the {txth P/ate;which reprefents.about 
adozen of them lying upon a plate ABCD, fone of which, as#, 6} ¢, d, 
{cem'd more regular than the reft, and.:c, which: was'a {mall one, ftick= 
ing.on the top of another, was a perfect Abombocid on the topy aad had 
four Reangular fides... 
» The line E which was the meafuie of the Aicbofube;i is 4 part of ari 
Englifh ae fo that the greateft bredth of any of them, exeeeded not 
vis oe of an Inch; © 
chp into feveral liquors, I found oy of Vitrial, Spirit’ 
Vrine,a feveral other Saline nen firuumns to difiolve them; and the fi 
ofthefe in lefsthan a minute without Ebullition,Water,and feveral other 
peed had ho fudden operatiomupon them. This I mention, becaule 
thofe liquors that diffolve them, firft make them very white, not aitiating, 
but rather rectifying their Fi re, and thereby make thera afford very 
- pretty objett for the Aficr cape. 
- How greatan mets eit would be to fuch as are tronbled: nich the 
Stone, to find fome ruum that might diflolve them without hurting 
the Serie caf ia in'd, fince fome injetions made of fuch bodies 
might likewife ftone; which a much of the fame nature. 
iS Te 
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