$431
Tangent Galvanometer by the Central Scientific Company, Chicago, Illinois, 8 3/4-in. brass ring, copper-bezel indicator with paper dial divided into four quadrants marked 0-90, four brass and Bakelite binding posts connected to concentric insulated coils with indicator marks on bed 20-40-80-160, all mounted on a wood base with adjustable tripod base, ht. 11 1/2 in.
Auctioneer:
Skinner
Date:
2012-12-01