WILLIAM BARTON, ESQUIRE.
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Footnote A52:
The time above referred to, is supposed to have been in the year 1790
or 1791; though perhaps it may have been somewhat earlier. Dr. Sproat
died in the autumn of 1793. W. B.
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Memoirs of the life of David Rittenhouse, LLD. F.R.S., late president of the American Philosophical Society, &c. · 第 61 / 68 题