y. Other creatures, as
Mites, the Land-Crab, &c. have onely one small very sharp Tallon at the end
of each of their legs, which all drawing towards the center or middle of
their body, inable these exceeding light bodies to suspend and fasten
themselves to almost any surface.

Which how they are able to do, will not seem strange, if we consider,
first, how little body there is in one of these creatures compar'd to their
superficies, or outside, their thickness, perhaps, oftentimes, not
amounting to the hundredth part of an Inch: Next, the strength and agility
of these creatures compar'd to their bulk, being, proportionable to their
bulk, perhaps, an hundred times stronger then an Horse or Man. And thirdly,
if we consider that Nature does always appropriate the instruments, so as
they are the most fit and convenient to perform their offices, and the most
simple and plain that possibly can be; this we may see further verify'd
also in the foot of a Louse which is very much differing from those I have
been describing, but more convenient and necessary for the place of its
habitation, each of his leggs being footed with a couple of small claws
which he can open or shut at pleasure, shap'd almost like the claws of a
Lobster or Crab, but with appropriated contrivances for his peculiar life,
which being to move its body to and fro upon the hairs of the creature it
inhabits, Nature has furnish'd one of its claws with joints, almost like
the joints of a man's fingers, so as thereby it is able to encompass or
grasp a hair as firmly as a man can a stick or rope.

Nor, is there a less admirable and wonderfull _Mechanism_ in the foot of a
Spider, whereby he is able to spin, weave, and climb, or run on his curious
transparent clew, of which I shall say more in the description of that
Animal.

And to conclude, we shall in all things find, that Nature does not onely
work Mechanically, but by such excellent and most compendious, as well as
stupendious contrivances, that it were impossible for all the reason in the
world to find out any contrivance to do the same thing that should have
more convenient properties. And can any be so sottish, as to think all
those things the productions of chance? Certainly, either their
Ratiocination must be extremely depraved, or they did never attentively
consider and contemplate the Works of the Al-mighty.

* * * * *

Observ. XXXVIII. _Of the Structure and motion of th