There could be
but one diameter drawn through such a slice, which would divide it into
two equal parts. On every other possible diameter, the parts would hang
unequal. This would produce an irregularity in the diurnal rotation.
We may, therefore, conclude it impossible for the poles of the earth
to shift, if it was made spheroidical; and that it would be made
spheroidical, though solid, to obtain this end. I use this reasoning
only on the supposition, that the earth has had a beginning. I am sure I
shall read your conjectures on this subject with great pleasure, though
I bespeak beforehand, a right to indulge my natural incredulity and
scepticism. The pain in which I write, awakens me here from my reverie,
and obliges me to conclude with compliments to Mrs. Thomson, and
assurances to yourself of the esteem and affection with which I am
sincerely, Dear Sir, your friend and servant,
Th: Jefferson.
P. S. Since writing the preceding, I have had a conversation on the
subject of the steam-mills, with the famous Boulton, to whom those of
London belong, and who is here at this time.
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