rving it through
the Tube, and changing my Eye into various positions, that so there might
be no kind of Fallacy in it) could be nothing else, but some more _Dusky_
and _Spotted_ parts of the Face of this Planet.

_March_ 10. finding the Air very bad, I made use of a very shallow
Eye-glass, as finding nothing _Distinct_ with the greater _Charge_; and saw
the appearance of it as in C, which I imagin'd, might be the Representation
of the former Spots by a lesser charge. About 3 of the Clock the same
morning, the Air being _very bad_ (though to appearance _exceeding clear_,
and causing all the Stars to twinckle, and the minute Stars to appear very
thick) the body seem'd like _D_; which I still suppos'd to be {241} the
Representation of the same Spots through a more confused and glaring Air.

But observing _March_ 21. I was surprised to find the Air (though not so
clear, as to the appearance of small Stars) so _exceeding transparent_, and
the Face of _Mars_ so very well _defined_, and round, and distinct, that I
could manifestly see it of the shape in E. about half an hour after Nine at
night. The _Triangular_ spot on the right side (as it was inverted by the
Telescope, according to the appearances, through with all the preceeding
_Figures_ are drawn) appear'd very black and distinct, the other towards
the left more dim; but both of them sufficiently plain and defin'd. About a
quarter before 12. of the Clock the same night, I observ'd it again with
the same Glass, and found the appearance exactly, as in F; which I imagin'd
to shew me a _Motion_ of the former triangular spot: But designing to
observe it again about 3. of the Clock the same Morning, I was hindred by
cloudy weather.

But _March_ 22. about half an hour after 8. at night, finding the same
Spots in the same posture, I concluded, that the preceeding Observation was
only the appearance of the same Spots at another height and thickness of
the Air: And thought my self confirm'd in this Opinion, by finding them in
much the same posture, _March_ 23. about half an hour after 9. though the
Air was nothing so good as before.

And though I desired to make Observations, about 3. of the Clock those
mornings; yet something or other interven'd, that hindred me, till _March_
28. about 3 of the Clock, the Air being light (in weight) though moist and
a little hazy; when I plainly saw it, to have the form, represented in I;
which is not reconcileable with the other Appearances,