Speaking-tubes used to communicate with gunners on warships

Title (Dublin Core): Speaking-tubes used to communicate with gunners on warships
Subject (Dublin Core): en Technology; en Communication; en Ships
Article Title and/or Image Caption (Dublin Core): Voice-Tubes for the Ship's Gunners
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): 42
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): United States Navy
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): United States of America