Charles Mason was an astronomer and surveyor; he was elected to the American Philosophical Society in 1768.
Presented by Thomas D. Cope and accessioned, 1946. See in-house shelf list for additional accession information and location of materials.
Originals in The National Archives, Washington, D.C.
This material is also available in photocopy form, see Correspondence and accounts of the Mason and Dixon survey (B M381.1).
This is a microfilm of an early American collection that may be of interest to researchers at the APS and may complement an original manuscript collection at the APS.