The panoramic periscope of French submarines

Title (Dublin Core): The panoramic periscope of French submarines
Subject (Dublin Core): en Technology; en Submarines; en Reconnaisance
Article Title and/or Image Caption (Dublin Core): Image caption: In the center of the panorama appears the image of a ship upon which the eye of the inner periscope is focused. In the first of the diagrams the full lines show the refraction of rays admitted by the annular lens, while in the other they indicate the path of those forming the middle image.; Article title: PANORAMIC PERISCOPE MADE FOR FRENCH SUBMARINES
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War, 1914-1918; World War I
Date Issued (Dublin Core): 1915-10
Is Part Of (Dublin Core): Popular Mechanics, v. 24, n. 4, 1915
pages (Bibliographic Ontology): 484-485; Cover
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Iacopo Tonon; Davide Donà (supervisor)
Spatial Coverage (Dublin Core): French Third Republic