A Wheatstone Bridge by Thompson-Levering 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

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"

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)

Coffin Shaped. 3"

A rare American coffin shaped poison bottle embossed as F.A. / Thompson / & Co. / Detroit in 4 lines - Poison on either side, reverse panel blank. Coffin Shape, tooled lip, embossed nubs. Light roughn

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

Original cast iron bridge plate for the American Bridge company of New York. Showing oxidation and some surface rust, with a great early look. Condition: (Good). Dimensions: 10" x 16".

43"x15" cast iron 1885 King Iron Bridge Co. bridge builders plate, Cleveland, OH

Very nice early Wrought Iron Bridge Co. cast iron advertising sign. Sign is in nice condition with surface rust and wear from use and age. Dated 1928. Measures approximately 19" tall by 42" across.

A Wheatstone Bridge by Edelmann, Muchen, Late 19th/Early 20th Century. Interior galvanometer appears to have been removed. There are provisions for an external galvanometer. Instrument labeled: 1(ohm)

Canadian. 1920s. Framed painted wood. All script is incised, likely to allow ease in repainting. The board was repainted during or after use. Flaking paint reveals a whitewash-like surface beneath the

1912 13"x14" cast iron American Bridge Co. of New York sign, weighs 15 lbs.

Canadian. C. 1914. Brass. 10" x 16" x 0.5".

Canadian. C. 1948. Brass. 8" x 12" x 1".

Canadian. C. 1924. Brass. 8" x 13" x 0.25".

15"x21" embossed cast iron King Bridge Co., Cleveland, O. sign

It shows some wear, wood chips, and discoloration throughout. One of the boards at the top is not nailed down. It displays well and would look great in a general store setting. Measures: 16.5"x31"x20"

TRADE CATALOG-THE BERLIN IRON BRIDGE CO. EAST BERLIN, CT, CA. 1880'S. MEASURES APPROX. 6 3/4" X 10". ORIGINAL PICTORIAL PRINTED WRAPS. 127PP CONTAINING NUMEROUS DESIGNS FOR IRON BRIDGES THROUGHOUT NEW

14 1/4" wide x 10" deep x 5 1/2" high.

A. T. Thompson & Co., Boston, Field Camera Lens Late 19th century. L 6 1/2 in.

CAST IRON 1913 "AMERICAN BRIDGE CO. BUILDERS ALBANY, NY PLAQUE, 21 1/2"H X 15"W GOOD AMOUNT OF PAINT LOSS & SURFACE RUST