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Astronomical Notes - Astronomische Nachrichten
he was residing at the time with one of his sons. A stroke of paralysis three years previously, had terminated his scientific activity. In early childhood, he developed an extraordinary capacity, for the mental solution of difficult arithmetical problems, which attracted general attention, and secured for him the interest of eminent friends, and the opportunity for a thorough education. In 1854, he graduated at Harvard College, and immediately obtained employment at the Observatory of thatdoi:10.1002/asna.19011570507 fatcat:dedlzdedyrbgxlwgv3sqz5sdm4