Sails, ropes, nets, etc., keep much longer when they have been treated with tannin. Hence Lebrun recommends the following process for preserving linen goods and yarn: 2 1/4 lb. good oak-tan is boiled for 1/2 hour in 4 1/2 gal. pure running water. After filtering and pressing the residue, you get about 3f gal. tanning liquor. With this the stuffs or yarns are brewed in copper, earthen, or wooden vessels, but not in iron. The fluid must completely cover the stuffs or yarns, which should be left in it for 48 hours, and stirred round in it from time to time. They are then to be taken out, wrung, washed, wrung again, and, after being dried, they show a slight leather-like colour, and withstand all the effects of damp and the action of the weather much better than those not so treated. Unbleached goods may be treated in this way as well as bleached, but they must be first steeped. Linen goods that are already partly decayed may be thus protected from further injury. Linen goods subjected to this process for 72 hours have been found unaffected by lying spread out for 10 years in a damp murky cellar, while untanned goods were almost completely destroyed.