Cooley, Mark O., was born at Canandaigua, N. Y., December 25, 1861, and was a son of Nathaniel N. Cooley, a farmer of that place, now deceased. Mr. Cooley was educated in the Canandaigua Academy and at the age of seventeen returned to the homestead farm, where he tilled the soil. From 1882 until 1885 he studied dentistry in the office with C. J. Andruss of Canandaigua, at which time he went to Philadelphia, Pa., where he completed a two years' course in the Philadelphia Dental College and was graduated in 1887. In the same year he came to Niagara Falls, where he has since had a large and successful practice in dentistry.
Contributed 2017 by Lisa Slaski from Landmarks of Niagara County, New York, by William Pool, D. Mason & Co., Syracuse, NY, 1897
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