This lot is closed for bidding. Bidding ended on 4/10/2025
[SCIENTIFIC INSTRUMENT]. “Waltenhofen's Pendulum" Electro-Magnetic Pendulum Machine to Demonstrate Eddys in Magnetic Fields. Chicago: Milvan Scientific Instruments for Chicago Apparatus Company, [ca. 20th century]. Two copper coils mounted onto a wooden base, beneath a metal frame with copper pendulum dangling between the coils. Pendulum moves smoothly between coils. Untested. 14 ¼" high. Some wear, soiling. Very good.