Oscar Bagnall

Reginald Oscar Gartside Bagnall (March 28, 1893 - August 30, 1978) was a British science teacher, biologist, and amateur chromatist, noted as author of a book in the area of auric research called The Origin and Properties of the Human Aura (1937), which built on the earlier studies of Walter J. Kilner with dicyanin screens and expanded to include Bagnall's own pinacyanol screens.