A one-page reprint from the 'From the Classics' column of Master Weaver (No. 15, May 1954) of Alexander Peddie's 1822 Glasgow instructions for boiling linen yarn. It describes steeping the yarn in soft water, boiling it with pot ashes and then pearl ashes, washing out the lye, and drying it. The aim is to soften and clean the yarn, make it firmer, and let the weaver set the cloth closer. An editorial footnote gives approximate ash proportions and explains the difference between pot ash and pearl ash.