in American National Biography Online
January 1999; p ublished online February 2000 .
Reference Entry. Subjects: Astronomy and Astrophysics; Science and Mathematics; Instruments and Instrumentation Engineering; Mathematics. 2346 words.
Rittenhouse, David (08 April 1732–26 June 1796), astronomer, mathematician, and maker of mathematical instruments, was born at Paper Mill Run near Germantown, Pennsylvania, the son of...
in Oxford Dictionary of National Biography
September 2004; p ublished online September 2004 .
Reference Entry. Subjects: Mathematics; Science and Mathematics; Instruments and Instrumentation Engineering. 1501 words.
Sharp, Abraham (bap. 1653, d. 1742), mathematician and scientific instrument maker, was born at Horton Hall, Little Horton, near Bradford, and baptized at Bradford, Yorkshire, on 1 June...