Hardening composite plates for bank vaults by immersion in the Hudson River. hardening to make burglar-proof vaults.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner

Created on

Monday 16 November 2009

Posted on

Monday 16 November 2009

Tags

construction, invulnerability, iron, protection, robbery, steel, strength, theft

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• General Magazines / Science and Technology Magazines / Scientific American

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