_
Observ. 17. Of Wood, and other Bodies, petrified.
_Several Observations of divers kinds of these substances. A more
particular examination and explication of one very notable piece of
petrified Wood; and some Conjectures about the cause of those productions:
several Observations made on other petrified Bodies, as shells, &c. And
some probable Conclusions thence deduc'd, about the original cause of those
Bodies._
Observ. 18. Of the Pores of Cork, and other Bodies.
_Several Observations and Considerations about the nature of Cork: the
number of Pores in a cubical Inch, and several considerations about Pores.
Several Experiments and Observations about the nature of Cork: the Texture
and Pores of the Pith of an Elder, and several other Trees: of the Stales
of Burdocks, Teasels, Daisies, Carret, Fennel, Ferne, Reeds, &c. of the
frothy texture of the Pith of a Feather: some Conjectures about the
probability of values in these Pores. Argued also from the _Phaenomena_ of
sensible and humble Plant: some Observations on which are inserted._
Observ. 19. Of a Vegetable growing on blighted Leaves.
_Several Observations and Examinations made of them: several Considerations
about spontaneous generation arising from the putrefaction of Bodies._
Observ. 20. Of Blew Mould and Mushromes.
_The description of several kinds of Moulds. The method of proceeding in
natural Inquiries.
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