1. Electric Waves: Being Researches on the Propagation of Electric Action With Finite Velocity Through Space
by Hertz, Heinrich Rudolph 
Price: USD 19.19
Dealer: Alibris, Goodwill of Silicon Valley via Alibris
Description: Cornell University Library 1893 Softcover Fair 

2. Electric waves: being researches on the propagation of electric action with finite velocity through space
Price: USD 20.70
Dealer: Biblio, Better World Books
Description: Used - Good. Former library book; may include library markings. Used book that is in clean, average condition without any missing pages. ISBN 1429740361 9781429740364 [US]