The D-19 formula (from Kodak's publication
J-1):

Water, about 50 degrees C 500ml

Kodak ELON Developing agent (aka Metol or p-methylaminophenol sulfate) 1.0
gram
Kodak Sodium sulfite
(anhydrous)
75.0 grams
Kodak
Hydroquinone
9.0 grams
Kodak Sodium Carbonate
(monohydrate) 30.0
grams
Kodak Potassium Bromide
(anhydrous)
5.0 grams Cold water to make 1 liter.