o each kinde of light, I drew that representation of it which
is delineated in the 24. _Scheme_, and found these things to be as plain
and evident, as notable and pleasant.

_First_, that the greatest part of the face, nay, of the head, was nothing
else but two large and _protuberant_ bunches, or _prominent_ parts, ABCDEA,
the surface of each of which was all cover'd over, or shap'd into a
multitude of small _Hemispheres_, plac'd in a _triagonal_ order, that being
the closest and most compacted, and in that order, rang'd over the whole
surface of the eye in very lovely rows, between each of which, as is
necessary, were left long and regular trenches, the bottoms of every of
which, were perfectly intire and not at all perforated or drill'd through,
which I most certainly was assured of, by the regularly reflected Image of
certain Objects which I mov'd to and fro between the head and the light.
And by examining the _Cornea_ or outward skin, after I had stript it off
from the several substances that lay within it, and by looking both upon
the inside and against the light.

_Next_, that of those multitudes of _Hemispheres_, there were observable
two degrees of bigness, the half of them that were lowermost, and look'd
toward the ground or their own leggs, namely, CDE, CDE being a pretty deal
smaller then the other, namely, ABCE, ABCE, that look'd upward, and
side-ways, or foreright, and backward, which variety I have not found in
any other small Fly.

_Thirdly_, that every one of these _Hemispheres_, as they seem'd to be
pretty neer the true shape of a _Hemisphere_, so was the surface exceeding
smooth and regular, reflecting as exact, regular, and perfect an Image of
any Object from the surface of them, as a small Ball of Quick-silver of
that bigness would do, but nothing neer so vivid, the reflection from these
being very languid, much like the reflection from the outside of Water,
Glass, Crystal, &c. In so much that in each of these _Hemispheres_, I have
been able to discover a Land-scape of those things which lay before my
window, one thing of which was a large Tree, whose trunk and top I could
plainly discover, as I could also the parts of my window, and my hand and
fingers, if I held it between the Window and the Object; a small draught of
nineteen of which, as they appear'd in the bigger Magnifying-glass to
reflect the Image of the two windows of my Chamber, are delineated in the
third _Figure_ of the 23. _Scheme_.