Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 56
nism oi Frequency Meter, Sign of Fig. 54, where several resistance wires are stretched in parallel between two large copper blocks, B, B^. All of these wires are of small diameter, such as No. 36 or No. 40 B. & S. gauge, hence they offer practically the same resistance to current, of… … -Mechanism Wattmeter.
Telegraph, Wireless
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-105-44.webp)