So the Steigmann formula was from the time of active gelatins - it needed less sulfur than what phthalated gelatin of today would need as the active gelatin already had sulfur in it?

One of the books I have, I forget which, has a nice graph showing the speed increase from gold alone and sulfur alone and the two combined. Sulfur alone was more effective than gold alone, but the two combined with much better than either alone.