San Francisco : Architect and Engineer, Inc · leaf 234
c which has an affinity for steel, willcoat the entire nail with a relatively thick coating of zinc and lead mix-ture known as spelter. The nails are then taken out and tumbled toremove surplus spelter. The recent improvement in this process hasenabled the manufacturers to produce a practically… … ?T1 lll!|I!?n|iE!m! rpFs
Architecture · Building
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