Newton employs it in combination with pyrogallol and soda in the development of bromo-gelatine plates.
"Scientific American Supplement, No. 483, April 4, 1885" by Various
Councler substitutes phloroglucinol for pyrogallol, with the advantage of doing away with the digestion at high temperature.
"Researches on Cellulose" by C. F. Cross
The light from ozone acting on pyrogallol solution is especially bright under certain conditions.
"The Nature of Animal Light" by E. Newton Harvey
The pyrogallol tans yield very different amounts of bloom.
"Animal Proteins" by Hugh Garner Bennett