Ron, this is almost exactly the Agfa Lupex "type" formula, Normal Grade, scaled down by a factor of 200 :-)

Except in the Agfa Formulae the Rhodium Chloride is in Part C (3) rather than in Part A (1) and the gelatin in Part D (4) has KI added, and is dissolved in water.

In addition for the Normal grade paper both ripening times are 10mins at 60°C.

Ian