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Hooke, Robert, 1635-1703 / Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses : with observations and inquiries thereupon
(MDCLXVII [1667])

Observ. XVIII. Of the schematisme or texture of cork, and of the cells and pores of some other such frothy bodies,   pp. 112-121


Page 112


112                M     I C R O G R A P H I A.
     fome other caverns in another, and others in a third,or a fourth, or
a fifth
     place, for fO many differing fubftances have I found in one ofthefepe-
     trify'd Shells,and perhaps all there differing from the encompaffing
earth
     or fione; the means how all which varieties may be caus'd, I think,
will
     not be difficult to conceive, to any one that has taken notice of thofe
     Shells, which are commonly found on the Sea more: And he that mhall
     throughly examine feveral kinds of fuch curioufly form'd ftones,will
(I
     am very apt to think) find reafon to fuppofe their generation or forma-
     tion to be ascribable to fome fuch accidents as I have mention'd, and
     not to any PlaiJiick virtue: For it feems to me quite contrary to the
in-
     finite prudence of Nature, which is observable in all its works and
pro-
     dudions, to defign every thing to a determinate end, and for the attair?-
     ing of that end, makes ufe of fuch ways as are (as farr as the knowledge
     of man has yet been able to reach) altogether consonant, and molt
     agreeable to man's reafon, and of no way or means that does contradict,
     or is contrary to humane Ratiocination; whence it has a long time been
     a general observation and maxirne, that Nature does nothing in vain;
It
     feems, I fay, contrary to that great Wifdom of Nature, that thefe prettily
     fhap'd bodies mould have all thofe curious Figures and contrivances
     (which many of them are adorn'd and contriv'd with) generated or
     wrought by a Plafiick virtue, for no higher end then onely to exhibite
     fuch a form; which he that mhall throughly confider all the circumftances
     of fuch kind of Figur'd bodies, will, I think, have great reafon to
be-
     lieve, though, I confefs, one cannot presently be able to find out what
     Nature's defigns are. It were therefore very defirable, that a good
col-
     leffion of fuch kind of figur'd ftones were collected; and as many par-
     ticulars, circumftances, and informations colleCred with them as could
be
     obtained, that from fuch a Hiftory of Obfervations well ranv'd, ex-
     amin'd and digefted, the true original or produdion of all thore kinds
     of ftones might be perfeftly and furely known; fuch as are Thunder-
     ftones, Lapides Stellares, Lapides judaici,and multitudes of other,
where-
     of mention is made in Aldrovandey wormixe , and other Writers of
     Minerals.
     Obferv. X V I I 1. Of the Schematifme or Texture of Cork, and
         of the Cells and Pores of fome other fiucb frothy Bodies.
      I Took a good clear piece of Cork, and with a Pen-knife fharpen'd as
      I keen as a Razor, I cut a piece of it off, and thereby left the furface
of
      it exceeding fmooth, then examining it very diligently with a Micro-
      fcope, me thought I could perceive it to appear a little porous 5 but
I
      could not fo plainly diftinguifh them, as to be fure that they were
pores,
      much lefs what Figure they were of: But judging from the lightnefs
and
      yielding quality of the Cork, that certainly the texture could not
be fo
                                                                   curious,


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