generally esteem'd useful, even to the ablest Physitian.

What may not be expected from the _rational_ or _deductive Faculty_ that
is furnisht with such _Materials_, and those so readily _adapted_, and
rang'd for use, that in a moment, at 'twere, thousands of Instances,
serving for the _illustration_, _determination_, or _invention_, of almost
any inquiry, may be _represented_ even to the sight? How neer the nature of
_Axioms_ must all those _Propositions_ be which are examin'd before so many
_Witnesses_? And how difficult will it be for any, though never so subtil
an error in Philosophy, to _scape_ from being discover'd, after it has
indur'd the _touch_, and so many other _tryals_?

What kind of mechanical way, and physical invention also is there requir'd
that might not this may be found out? The _Invention_ of a way to find the
_Longitude_ of places is easily perform'd, and that to as great
_perfection_ as is desir'd, or to at great an _accurateness_ as the
_Latitude_ of places can be found at Sea; and perhaps yet also to a greater
certainty then that has been hitherto found, as I shall very speedily
freely manifest to the world. The way of _flying_ in the Air seems
principally unpracticable, by reason of the _want of strength_ in _humane
muscles_; if therefore that could be suppli'd, it were, I think, easie to
make twenty contrivances to perform the office of _Wings_: What Attempts
also I have made for the supplying that Defect, and my successes therein,
which, I think, are wholly new, and not inconsiderable, I shall in another
place relate.

'Tis not unlikely also, but that _Chymists_, if they followed this method,
might find out their so much sought for _Alkahest_. What an _universal
Menstruum_, which dissolves all sorts of _Sulphureous Bodies_, I have
discover'd (which hat not been before taken notice of as such) I have shewn