David Rittenhouse was an instrument-maker, astronomer, and treasurer of Pennsylvania; he was elected to the American Philosophical Society in 1768.
2 volumes, ca. 438 p.
Presented by Mrs. Henry S. Lowber (v. 2), 1898; accessioned, 1900 (1900 2769). See in-house shelf list for additional accession information.
This collection contains two volumes of David Rittenhouse's daily diaries. The first volume contains meteorological data for 1792. The second volume is more content rich and covers the period in 1785 during which he traveled west to determine the boundaries of Pennsylvania. These records include observations on the environment, daily expenses, and other travel-related recordings. There are also various sketches, calculations, and other notes in these volumes.
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