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Médias: Objets- Médias: Ressources généalogiques
- Médias: Collections
- Groupes: Deux-Rivières, Ontario
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- Deux Rivières Boat Launch Ribbon
A piece of the Red Ribbon from the Deux Rivières boat ramp opening ceremony. A piece of the Red Ribbon from the Deux Rivières boat ramp opening ceremony.Head, Clara and Maria Public Library - Clara Township Map ca.1885
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 - Map of Clara Township
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
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