Kangaroo Cement
Rubber one ounce, pack tightly as possible in a
bottle and cover it with Bi-Sulphate of Carbon. When the rubber is
dissolved you will have the best cement in the world. There is a
fortune in this to an energetic man, as it sells at 25 cents a drachm;
and costs but little to make it. This is the cement used by shoemakers
to put invisible patches on shoes.