Note 373 — THE CONCLUSION: COMPREHENDING A RETROSPECT OF THE LIFE OF DAVID RITTENHOUSE,

All the boundary-lines, mentioned above, were determined by astronomical observations. The manner in which the work was performed, with an account of the instruments used on those occasions, will be found in the fourth volume of the Transactions of the American Philosophical Society. Some of Dr. Rittenhouse’s associates, in those arduous undertakings, were men of high reputation in the same departments of science; but his talents were principally relied on.