Fessenden distance finder

Title: Fessenden distance finder
Subject: en Imagined technology & prototypes; en Ships
Article Title and/or Image Caption: Sea-Safety Contest Winners
Contributor: Albert A. Hopkins (autor)
Language: ENG
Temporal Coverage: interwar period
Date Issued: 1930-01
Is Part Of: Scientific American, v. 142, n. 1, 1930
pages: 39
Rights: Public domain
References: Fessenden, Reginald Aubrey (1866-1932), inventor; Scientific American
Archived by: Lara Azzolini