A Wheatstone Bridge by Leeds & Northrup Co.,

A Wheatstone Bridge by Leeds & Northrup Co., Philadelphia, 20th Century, Together with a slide wire resistor, 20th Century. H: 2 1/2 W: 23 3/4 D: 6 1/4 in.

A Wheatstone Bridge by Leeds & Northrup Co., Philadelphia, 20th Century, and a Slide Wire Resistor, 20th Century. H: 2 1/2 W: 23 3/4 D: 6 1/4 in. Proceeds to benefit the Case Western Reserve Universit

Two portable volt meter type pc, a Westinghouse (East Pittsburg,Pa) and a Leeds & Northrup co. Philadelphia.

5.75 x 5.75 x 5.5 inches - some damage to base

12.75 x 9 x 7.75 inches when closed

9 x 7.5 x 6 inches when closed

A D'Arsonval Galvanometer by Leeds & Northrup Co., Philadelphia, Early 20th Century. H: 9 D: 4 3/4 ins. Proceeds to benefit the Case Western Reserve University Dayton Miller Scholarship Fund.

2 LEEDS & NORTHRUP CO. REFLECTING GALVANOMETERS Two Leeds & Northrup Co. reflecting galvanometers. Serial numbers 1067355 and 207797. Weight: 9.25" Shipping / Pickup: Buyer Pick Up, 3rd Party

Leeds & Northrup Co. Three Decade Resistors

Mfg. by Wheelco Instruments Co. Dimensions: 8.00 " W x 11.00 " H x 5.00 "D; 

18 x 11 x 9 inches when covered

Vintage Leeds & Northrup Co Light beam Galvanometer Model 2420 in wooden case

19.5 x 8.25 x 3.75 inches; untested

13.25 x 7.5 x 7.25 inches

24 x 7.5 x 5.25 inches when covered - some wear to case; untested

Vintage Leeds & Northrup Co Potentiometer, 600 OHM Attenuation Box General Radio Co

Decade resistor box by Leeds & Northrup Co. Philadelphia. Patent No. 191685. Dimensions: 14.00 " W x 5.00 " H x 1.25 "D; 

An Electrical Resistor Decade Box by Leeds & Northrup Co., Philadelphia, 20th Century. Numbered 6203. Having copper fittings. H: 5 1/8 W: 8 1/4 D: 3 3/4 ins. Proceeds to benefit the Case Western Reser

United States,Circa 1907 Accompanied with original museum label stating "WHEATSTONE BRIDGE 1907 WESTERLY AUTOMATIC TELEPHONE COMPANY", housed in a dovetailed wood box. 6" X 6 1/2" X 10",Wood, metal

Wheatstone Bridge, 24"

Scientific Testing Equipment (6), Mid-Century wood case w/a Weston Illumination meter Model 603, Leeds & Northrup potentiometer, GE ac voltmeter, Industrial Instruments conductivity bridge, Hotpoint o

Cast-iron bridge plate sign from Canton, Ohio, pat. date April 26, 1870. Nicely repainted. Condition: (6.0). Dimensions: 11 - 1/2" x 47 - 1/2".

Black cast iron sign with a Victorian style motif, accented by blue and gold details. There is wear throughout and shows loss of color but is fantastic piece of history.. Condition: (Good - Very Good)

Wilmington, Ohio. This is a heavy cast iron bridge sign that is embossed. Rare early piece!! 19 in x 41 1/2 in.