To make cheap flour paste suitable for laying linoleum and oilcloth, mix rye flour with a little cold water, then add boiling water, well stirring the paste while the water is being poured. Melt some glue size and add to the paste while both are hot. Stir well. The more size is added the greater the strength of the paste. As a rule, " Inlaid " linoleums require very strong paste. A little alum dissolved in the paste is a preservative. If the paste is too thin, boil it, to evaporate some of the water.