MicroGRapHyVa, 
_ After what manner this Kettering-ftone fhould be generated I cannot 
learn, having never been there to view the place, and obferve the cir- 
cumftances 3 but it feems to me from the ftructure of it to be generated 
from {ome fubftance once more fluid, and afterwards by degrees growing 
harder, almoft after the fame manner as I fuppofed the generation e 
Flints to be made. Sit in se 5 Be ay 
But whatever were the caufe of its curious texture, we may learn this | 
information from it; that even in thofe things which we account vile, | 
rude;and coorfe, Nature has not been wanting to fhew abundance of cu- | 
riofity andexcellent Mechanifme. > e PER pa ts 
We may here find a Stone by help of a Aéicrofcope, to be made up of 
abundance of {mall Balls, which do but juft touch each other, and yet 
there being fo many conta¢ts,they make a firm hard maf, or a Stohe- much 
harder then Free-{tone.. ; | 
_ Next, though we can by a Afcrofcope difcern fo curious a fhapein the 
particles, yet to the naked eye there {Carce appears any fuch thing’; 
which may afford us a good. argument to think, that even in thofe bodies 
alfo, whole texture we are not able to difcern, though help'd with Aficro- 
Jfeopes, there may be yet Jatezt {o curiousa ichemalifne that it may abun- 
dantly fatisfiethe curious fearcher, who fhall be fo happy as to find fome 
way to difcover it. | : 
Next, we here find aStone, though to the naked eye a very clofe,one, 
yet every way perforated with innumerable pores, which are nothing elfe 
ut the z#ter{tztia,between thofe multitudes of minute globular particles, 
that compofe the bulk it felf;, and thefe pores are not only difcover'd by 
the Aficrofcope, but by. this contrivance. hd He ee 
Itook a pretty large piece of this{tone, and covering it all over with 
cement, fave only at two oppofite parts, I found my {elf able, by blowing 
In at one end that was left open, to blow my fpittle,with which I had wet 
the other end, into abundance of bubbles, which argued thefe pores to 
be open and pervious through the whole ftone, which affords usa very , 
pretty Anitance of the porouinefs of fome feemingly clofe bodies,of which — 
dIfhall anon have occafion to fubjoyn ‘many more, tending to prove 
the fame thing. | sine: oa age 
-I muft.not here omit to take notice, that in this body there 1s not a 
vegetative faculty that fhould {o contrive this ftructure for any peculiar 
ule of Vegetation or growth, whereas in the other inftances of vegetable 
porous bodies, there isan amima, or forma informans, that does contrive 
all the Structures and Mechanifmes of the conftituting body, to make 
them fubfervient and ufefull to the great Work or Function they are to 
rim. And fo I ghe& the pores in Wood, and other vegetables, in 
bones,aud other Animal fub{tances,to be as fo many channels, provided by 
the Great and Alwife Creator, for the conveyance of appropriated juyces 
to particular parts, And therefore,that this may tend, or be perviou all 
towards one part,and may have impediments,as valves or the like, to any 
other but in this body we have very little reafon to fulpett there fhould 
e any fich defign, for. it is equally, pervious every way, not onely for- 
é ? 
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