Scientific American 32, 29.4.1848
Logwood chips, half a pound, gue, quarter of a pound; indigo, pounded very fine, quarter of an ounce; soft soap, quarter of an ounce; isinglass, quarter of an ounce. Boil these ingredients in two pints of vinegar and one of water during ten minutes after ebullition, then strain the liquid. When cold it is fit for use. To apply the French polish, the dirst must be cleaned from the boots or shoes; when these are quite dry, the liquid polish is put on with a bit of sponge.