Tin-can telephone receiver

Title (Dublin Core): Tin-can telephone receiver
Subject (Dublin Core): en Technology; en Reconnaisance
Article Title and/or Image Caption (Dublin Core): Title: Inventions the war has brought out; Caption: Listening to the sound of heavy guns with the aid of a tin-can telephone receiver. A tin can, suspended from a copper wire which is wound about a pencil or penholder pressed against the bone back of the ear, makes an excellent instrument for detecting these sounds when they cannot be heard otherwise
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 11916-03
Is Part Of (Dublin Core): Popular Science Monthly, v. 88, n. 3, 1916
pages (Bibliographic Ontology): 364
Rights (Dublin Core): Public domain
Source (Dublin Core): Google Books
Archived by (Dublin Core): Filippo Valle