Theory and Operation of Direct-Current Machinery. Cyril M. JANSKY.

Theory and Operation of Direct-Current Machinery

New York: McGraw-Hill, 1917. First Edition. 8vo. Black cloth with gilt lettering on spine. Line illustrations and photos throughout. 285 pp.
Covers a bit scuffed. Liquid stain on left edge of front cover which is visible to front free endpaper. Tight and clean.
This is a scarce first edition academic text dealing with the principles of electromagnetism and operation of dynamoes and heavy machinery. Item #1452

Price: $20.00