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George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', front cover. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 1. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 2. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 3. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 4. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 5. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', page 6. 2660.
George Haseltine (1870) Patent for 'Instruments for obtaining solar measurements of latitude and time', spec. 2660.