Inside Out Library · Explore
Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 32
Fig. 18—Variation of Magnetic Field by OpposingCoils.Telegraph, Wireless
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
More pictures from Practical wireless telegraphy; a complete text book for students of radio communication
More like this
