Definitions for sharp, abraham
The Nuttall Encyclopedia
a schoolmaster of Liverpool, and subsequent bookkeeper in London, whose wide knowledge of mathematics, astronomy, &c., attracted Flamsteed (q. v.), by whom he was invited in 1688 to enter the Greenwich Royal Observatory, where he did notable work, improving instruments, and showing great skill as a calculator; published "Geometry Improved," logarithmic tables, &c. (1651-1742).
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