Air-Raid Vault Uses Chain of Gas Masks (Aug, 1939)

Air-Raid Vault Uses Chain of Gas Masks

Like smokers grouped around a Turkish bubble pipe, users of a new French air-raid shelter inhale from a common source. Tubes connect their masks with a single pipe leading from a battery of oxygen cylinders, as shown above. Thus they are constantly assured of pure air to breathe, without recourse to poison-absorbing canisters that hinder free respiration; and elaborate gasproofing precautions may be dispensed with.

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