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. Several Considerations about the nature of Mould and
Mushromes. 1. That they may be produc'd without seed. 2. That they seem to
have none. 3. That Salts, &c. are shap'd into as curious figures without a
seed. 4. Of a kind of Mushrome growing in a Candle: A more particular
explication of this last sort of Mushromes. 5. Of the figure and manner of
the production of petrified Iceicles: several deductions from these
Considerations, about the nature of the vegetation of Mould and Mushromes._

Observ. 21. Of Moss.

_The description of several sorts of Mosses; upon this occasion several
Conjectures, about the manner of the production of these kinds of Bodies,
are hinted, and some of them explicated by a Similitude taken from a piece
of Clock-work, The vast difference of the bigness of vegetable Bodies; and
the probability that the least may comprehend as curious contrivances as
the greatest. Of multitudes of other Moulds, Mosses, and Mushromes, and
other vegetating Principles, in Water, Wood, _&c.

Observ. 22. Of Sponges, and other fibrous Bodies.

_Several Observations and Conjectures about the making of these Bodies, and
several Histories out of Authors. Scarce