A device used by Germans to ventilate their shelters

Title (Dublin Core): A device used by Germans to ventilate their shelters
Subject (Dublin Core): en Technology; en Other
Article Title and/or Image Caption (Dublin Core): Removing the German Germs
extracted text (Extract Text): CANADIANS found this queer instrument outside a one-

time German dug-out. When they turned the handle,
blasts of impure German air gushed forth, while pure air
poured in. It was a German machine for drawing bad air
out of dug-outs, worked on the vacuum principle.
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-01
Is Part Of (Dublin Core): Popular Science Monthly, v. 94, n. 1, 1919
pages (Bibliographic Ontology): 52
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): Western Front of World War I