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Médias: Collections- Médias: Images
- Année: 1886
- Année: 1886
- Creative Commons : by-nc-nd
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- 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 - Photograph of a young man
Photographer Henry W. Simpson, a partner in Simpson Brothers, is listed as operating in Toronto on 357 Yonge St. in ca. 1886-1921. Photographer Henry W. Simpson, a partner in Simpson Brothers, is listed as operating in Toronto on 357 Yonge St. in ca. 1886-1921.Richmond Hill Public Library - Maggie Murray
John Zybach is listed as operating photography business in Niagara Falls in 1886-1892. John Zybach is listed as operating photography business in Niagara Falls in 1886-1892.Richmond Hill Public Library
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