Collection: Osher Collection
Name: [Scientific and natural phenomenon] Calculation of the longitude of Portland by George Blackburn ; Calculation of the longitude of Mountjoy by Captain Moody.
Barcode:
Image Number:
Creator:
Notes: Two oversize sheets of astronomical observations to calculate the longitude of Portland and Mountjoy, Portland, Maine, dated 1821 and 1831.
Physical Description:
Date/Date Range Produced:
Language:
Donor:
Permanent URL:
