To Cleanse Silks, Woolens, and Cottons
Grate raw potatoes to a fine pulp in clean water, and pass the liquid matter through a coarse sieve into another vessel of water ; let the mixture stand still till the fine white particles of the potatoes settle to the bottom; then pour off the liquor from the sediment, and preserve it for use. The article to be cleaned should be laid upon a cloth on a table ; dip a clean sponge into the liquor, and apply it to the article to be cleaned, till the dirt is perfectly separated, then rinse it in clean water several times. Two middle size potatoes will be sufficient for a pint of water. Should there be any grease spots on the articles, they should be previously extracted.
Source: Valuable Receipts, J.M. Prescott