_Scheme_.
_Fourthly_, that these rows were so dispos'd, that there was no quarter
visible from his head that there was not some of these _Hemispheres_
directed against, so that a Fly may be truly said to have _an eye every
way_, and to be really _circumspect_. And it was further observable, that
that way where the trunk of his body did hinder his prospect backward,
these _protuberances_ were elevated, as it were, above the plain of his
shoulders and back, so that he was able to see backwards also over his
back.
_Fifthly_, in living Flies, I have observ'd, that when any small mote or
dust, which flies up and down the air, chances to light upon any part of
these knobs, as it is sure to stick firmly to it and not fall, though
through the _Microscope_ it appears like a large stone or stick (which one
would admire, especially since it is no ways probable that there is any wet
or glutinous matter upon these _Hemispheres_, but I hope I shall render the
reason in another place) so the Fly presently makes use of his two
fore-feet in stead of eye-lids, with which, as with two Brooms or Brushes,
they being all bestuck with Brisles, he often sweeps or brushes off what
ever hinders the prospect of any of his _Hemispheres_, and then, to free
his leggs from that dirt, he rubs them one against another, the pointed
Brisles or Tenters of which looking both one way, the rubbing of them to
and fro one against another, does cleanse them in the same manner as I have
observ'd those that Card Wool, to cleanse their Cards, by placing their
Cards, so as the teeth of both look the same way, and then rubbing them one
against another.
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