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      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 …

      The communities covered in this directory are: Alberton Ayr Bishopsgate Branchtown Brantford Brantford Township Burford Cainsville Cathcart Claremont Galt Glen Morris Globe's Corners Harley Harrisburgh Kelvin Langford Middleport Mohawk Mount Pleasant Mount Vernon New Durham Newport Oakland Oakland Township Onondaga Onondaga Township Paris Princeton Rosebank St. George Scotland Shipman's Corners …