Aerial attack defense courses are being given regularly by the Ligue de Defense Aerienne of which Col. De Le Rocque is president. A session was held at the Invalides at which a poison gas alarm was given, and the attending public was drilled in the use of the masks. Photo shows a fair visitor masking herself.

Digital Commonwealth — Boston Public Library

Aerial attack defense courses are being given regularly by the Ligue de Defense Aerienne of which Col. De Le Rocque is president. A session was held at the Invalides at which a poison gas alarm was given, and the attending public was drilled in the use of the masks. Photo shows a fair visitor masking herself.

Wide World Photos, Inc. · [ca. June 1933]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Gas Masks

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