“With Special Reference To His Work In Polyphase Currents and High Potential Lighting” by Thomas Commerford Martin. Editor: The Electrical Engineer; Past-President American Institute Electrical Engineers 1894 The Electrical Engineer, New York. 1st Edition. Frontis portait. 496 pp inci. 3-pp Index. Numerous black/white text illustrations. Prominently SIGNED in ink by Tesla on half title page: fully guaranteed. Early owner signature of V.G. Converse on 1st blank & same name in stamp on upper right corner of title page. Original light orange cloth binding worn. Contents clean, tight, complete. Original edges un-trimmed. Format 6″xl0″ Research has found no other copies of the 1st Edition, even un-signed.