Public domain
New sand-blasting helmet. Washington, D.C., Oct. 15. Protection against that dreaded disease Silieosis, is assured underground workers with this new sand-blasting helmet developed by William P. Biggs, Safety Engineer of the Navy Department Weighing only 43 ounces the helmet has been tested for nearl
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineNew sand-blasting helmet. Washington, D.C., Oct. 15. Protection against that dreaded disease Silieosis, is assured underground workers with this new sand-blasting helmet developed by William P. Biggs,. 1936-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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