Leeds & Northrup Co #5365 Rotary Bridge

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

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

Rotary switch decade resistance bridges, manufactured by General Radio Co. Cambridge Ma, USA. Type 193 S/N 253; Type 102-K S/N 3144 Dimensions: 16.25 " W x 4.00 " H 

Wooton Desk Co. (Indianapolis, IN) Rotary Partners Desk circa 1885 walnut signed "Wooton's Patented Rotary Desk" 32 x 51 1/2 x 67 inches

This is a very early cast-iron check protector manufactured by the Defiance Machine Company of Rochester NY. Patent applied 1899 and issued 1907. Weighing 30 lbs. in original copper flash finish and a

Union Pacific Railroad - Through Kansas and Nebraska - Advertising Poster - Matthews, Northrup & Co. Poster measures approximately 14" x 22" The poster reads, "The Union Pacific Railway Through Kansas

Young, Robert R. (American, 20th Century), Three American Bridge Co. Bridges under Construction near Pittsburgh, circa 1950, watercolor, 18.5 x 24 inches, signed lower left,