biography of Quaker who discovered (and wrote about) condition. "Daltonism" is named after him. Includes sidebar about "Color Blindness"

by Webster's Online, includes ads, Wiki entry, and references.

page "from the 1998 History of Electrochemistry calendar" includes signature and (monochrome) portrai

One-page biography, with pictures. "he regarded himself as merely a school teacher"

on entry chemist-biologist-astronomer-writer who discovered color defeciency in brother and self.