This catalog was for ordering plaster reproductions of famous classical sculpture. I never knew the story of it until now.
Apparently Caproni went round the world to make casts from the original sculptures. This made hiss studio in Boston and very important museum in its own right.
I was looking around on the net to see if this studio still existed but, alas, no. But this company has some of the original casts and they can still be bought.