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We found 56 matching items.
Year: 1886- Creative Commons : by-nc-nd
- Maria Township ca. 1886
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 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 1, 1886
... ...Newmarket Public Library - Newmarket Era , January 8, 1886
... ...Newmarket Public Library - Newmarket Era , January 15, 1886
... ...Newmarket Public Library - Newmarket Era , January 22, 1886
... ...Newmarket Public Library - Newmarket Era , February 12, 1886
... ...Newmarket Public Library - Newmarket Era , February 19, 1886
... ...Newmarket Public Library - Newmarket Era , February 26, 1886
... ...Newmarket Public Library - Newmarket Era , March 5, 1886
... ...Newmarket Public Library - Newmarket Era , March 12, 1886
... ...Newmarket Public Library - Newmarket Era , March 19, 1886
... ...Newmarket Public Library - Newmarket Era , March 26, 1886
... ...Newmarket Public Library - Newmarket Era , April 2, 1886
... ...Newmarket Public Library - Newmarket Era , April 9, 1886
... ...Newmarket Public Library - Newmarket Era , April 16, 1886
... ...Newmarket Public Library - Newmarket Era , April 23, 1886
... ...Newmarket Public Library - Newmarket Era , April 30, 1886
... ...Newmarket Public Library - Newmarket Era , May 7, 1886
... ...Newmarket Public Library - Newmarket Era , May 12, 1886
... ...Newmarket Public Library - Newmarket Era , May 21, 1886
... ...Newmarket Public Library
