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A Group of Four Demonstration Electrostatic Induction Spheres, Late 19th Century. Two spheres with
A Group of Four Demonstration Electrostatic Induction Spheres, Late 19th Century. Two spheres with upper hole leading to the hollow interior to de...
A Wheatstone Bridge with Built-in Tangent Galvanometer by Electric MFG., Troy NY, ca. 1900s. H: 6 3/4 W: 8 3/4 D: 6 1/2 ins. Proceeds to benefit...
A Galvanometer in Original Box by Leeds & Northrup Co., Philadelphia, Mid-20th Century. H: 4 3/4
A Galvanometer in Original Box by Leeds & Northrup Co., Philadelphia, Mid-20th Century. H: 4 3/4 W: 3 D: 4 ins. Proceeds to benefit the Case...
A Telegraph Five-Hole Paper Tape Punch Manfactured by the J. H. Bunnell & Co., 20th Century. Used
A Telegraph Five-Hole Paper Tape Punch Manfactured by the J. H. Bunnell & Co., 20th Century. Used for approximately 5/8 inch wide paper. H: 6 W:...
A Combination Pony Relay-Sounder, Early 20th Century.
A Momentary Contact Switch with Two Parallel Keys, Early 20th Century. Can be used in open or closed
A Momentary Contact Switch with Two Parallel Keys, Early 20th Century. Can be used in open or closed mode. H: 3 1/2 W: 3 3/4 D: 5 1/2 ins. P...
A Pony Relay by J.H. Bunnell Co., NY, Late 19th/Early 20th Century.
A Vintage U.S. Custom House Hydrometer Complete Alcohol Tester Set, 20th Century. No. 710. ...[more]
A Large Pantograph by Keuffel and Esser Co., New York, Late 19th/Early 20th Century. Model number
A Large Pantograph by Keuffel and Esser Co., New York, Late 19th/Early 20th Century. Model number 1134, Serial number 1290. Together with a box o...
A Steam Engine Indicator by Schaffer & Budenberg, Early 20th Century. Having six springs and two
A Steam Engine Indicator by Schaffer & Budenberg, Early 20th Century. Having six springs and two rulers (one reads to 100 and the other to 80 grad...
A Cord Knitter with Instructions and Original Box, Late 19th/Early 20th Century. H: 2 3/4 W: 7 7/8
A Cord Knitter with Instructions and Original Box, Late 19th/Early 20th Century. H: 2 3/4 W: 7 7/8 D: 5 1/8 ins. ...[more]
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