Thomas Clark - chemist - was born in 1801.
Thomas Clark - chemist - died in 1867.
Karl Clark - chemist - was born in 1888.
Thomas Anderson - chemist - was born in 1819.
Thomas Thomson - chemist - was born in 1773.
Thomas Burr Osborne - chemist - was born in 1859.
Thomas Graham - chemist - was born on 1805-12-21.
Thomas Alonzo Clark was born in 1920.
Thomas D. Clark was born in 1903.
Thomas M. Clark was born in 1812.
Thomas Brown Clark was born in 1895.
Thomas Clark Nicholls was born in 1790.
Thomas J. Clark was born in 1869.