Re: Cleric's Gold Toner
There are several editions of Clerc. The one I have in front of me is:
Clerc, Louis Philippe. Photography, theory and practice. English
edition of "La technique", by L.P. Clerc, edited by George E. Brown.
London: Sir I. Pitman & sons, ltd., 1930.
There are also later editions from Pitman, Focal Press and Amphoto some of which differ considerably from the earlier editions. I'll send you a PDF of the formulas in the 1930 edition.
Robert W. Schramm wrote: