A concentrated, Phenidone-Glycin developer (J. D. Kendall, A. J. Axford)
Another interesting formula (in U.S. Pat. 2,753,265 by Kendall/Axford) from 1956. My source for the formula is Modern Photographic Processing by Grant Haist (vol. 1, Special-Purpose Developers, Concentrated Developers, p. 525).
422ml Potassium sulfite (71% w/v)
40g Glycin (p-Hydroxyphenylaminoacetic acid)
2g Phenidone (1-Phenyl-3-pyrazolidone)
Water to make 1l
To use, dilute the concentrate 1+9 with water, then add approx. 13g solid sodium hydroxide for a target pH of 9.1.
In the text (Haist), "Exposed, fast panchromatic film, developed 10 min at 68F, produced a fine-grain image of high photographic speed."
A forerunner of Ilfosol.