Wood Systems. Bulletin No.1097. Portable Wattmeter Calibrators, Type KM-1, for Alternating Current December 15, 1907
$20 · Offered by Kuenzig Books
Fort Wayne, Indiana: Fort Wayne Electric Works 1907. 4 pages, stapled and two-hole punched. 8 x 10 1/2 inches. Page edges trimmed and then stained red. Good. Staplebound. 27164 The second edition of this bulletin. Illustrated. Discusses a new tool that can be used to calibrate wattmeters in the field, greatly saving time for operators.
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