| Show ALUMINUM M SOOK BOOK q COVERS RESIST ti H Because in some seine parts of f Al Althe i ithe the air is s Sri 8 dry that the cove et books are re turned backby the th theand and lack of moisture an alum binding has has' been made mide for vol vol subject to such euch conditions Popular Mechanics aluminum cover is Is' of aboul u thickness of an tin tinIs tinis Is light in weight prow insect washable The he metal Is chew treated to take ordinary as well welt as as enamel or or oral al I paper Imper as us well as ns the cover lis ia I Insect Insect- proof Insect the paper being tr with a a carbonate of or soda lIolu |