Thursday, July 19, 2012

Masks for Railroad Tunnels (1922)

Rectangular pocket canister in use
Pocket canister with curved mouthpiece
Arno Carl Fieldner, Sidney H. Katz, Selwyne Perez Kinney. Test of gas masks and respirators for protection from locomotive smoke in railroad tunnels with analysies of tunnel atmospheres. (Washington: Government Printing Office, 1922).
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