Show New Nail NailA A new kind land of nail which which holds hold boxes together at the joints much better than ordinary nails has bas ha been invented by the Forest Pro Pro- Products Products Products ducts Laboratory of the United States Forest Service Chemical treatment causes minute pitting of the nails resulting in high frie- frie frictional contact of its surfaces with the wood fibers Nails treated in inthis inthis this way are arc two to three tithes times stronger in holding power than un- un untreated untreated untreated treated nails and the he pitted sur- sur surfaces surfaces surfaces faces do not rub off as does a ce- ce cement ment coating |