San Francisco : Architect and Engineer, Inc · leaf 128
ead. which contains approximatelysix per cent, antimony. Lead roofs on I-un)pean cathe-drals have lasted for 300 to 500years, and the metallurgists are ofthe opinion that lead as manufac-tured in those days had impuritiessufficient to harden it for rooting use. Sash Chain Company Establishes… … Fire ProofGa rages Steel Frames may be iiiude in ar-ror<lane«> with arrlii-teets plans.Also Portable All .S|«rl Buildings ManufuctiirfMl by p *!iv bp:nson &
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