Results
- Clara Township Map ca.1885Early surveyors, like William E. Logan, used Rochon micrometer telescopes and targets (disk on a calibrated pole) to measure distance. Each microscope had a different calibration and therefore a different range. The instruments were calibrated against a distance measured with a surveyors chain (also known as Gunter’s chain). One chain …Early surveyors, like William E. Logan, used Rochon micrometer telescopes and targets (disk on a calibrated pole) to measure distance. Each microscope had a different calibration and therefore a different …Head, Clara and Maria Public Library
- Newmarket Era , January 2, 1885......Newmarket Public Library
- Newmarket Era , January 9, 1885......Newmarket Public Library
- Newmarket Era , January 16, 1885......Newmarket Public Library
- Newmarket Era , January 23, 1885......Newmarket Public Library
- Newmarket Era , January 30, 1885......Newmarket Public Library
- Newmarket Era , February 6, 1885......Newmarket Public Library
- Newmarket Era , February 13, 1885......Newmarket Public Library
- Newmarket Era , February 20, 1885......Newmarket Public Library
- Newmarket Era , February 27, 1885......Newmarket Public Library
- Newmarket Era , March 6, 1885......Newmarket Public Library
- Newmarket Era , March 13, 1885......Newmarket Public Library
- Newmarket Era , March 20, 1885......Newmarket Public Library
- Newmarket Era , March 27, 1885......Newmarket Public Library
- Newmarket Era , April 3, 1885......Newmarket Public Library
- Newmarket Era , April 10, 1885......Newmarket Public Library
- Newmarket Era , April 17, 1885......Newmarket Public Library
- Newmarket Era , April 24, 1885......Newmarket Public Library
- Newmarket Era , May 1, 1885......Newmarket Public Library
- Newmarket Era , May 8, 1885......Newmarket Public Library