hydroquinine การใช้

"' Optochin "'( or "'ethylhydrocupreine hydrochloride "') is a derivative of hydroquinine introduced in 1911 by Morgenroth and Levy with the intention to treat pneumococci infection.
In 1924 Weston wrote this about his darkroom process, " I have returned, after several years use of Metol-Hydroquinine open-tank " developer to a three-solution Pyro developer, and I develop one at a time in a tray instead of a dozen in a tank . " Each sheet of film was viewed under either a green or an orange safelight in his darkroom, allowing him to control the individual development of a negative.