part 3

. Asphalt 10 parts Paraffine 2 parts Boiled oil 1 part

Any of these may be thinned with hot benzol or toluol. Toluol is less volatile than benzol and about as cheap, if not cheaper, the straw-colored grades being about 24 cents per gallon.

Examples of so-called “stone cement” are:

4. Pitch 8 parts Rosin 6 parts Wax 1 part Plaster 1⁠/⁠4 to 1⁠/⁠2