William Bird Herapath (1820–1868), British surgeon/chemist who patented Herapathite
Herapathite's dichroic properties came to the attention of Sir David Brewster, and were later used by Land in 1929 to construct the first type of Polaroid sheet polarizer.
William Bird Herapath (28 February 1820 – 12 October 1868) was an English surgeon and chemist known for his discovery of Herapathite.