1920 RARE ANT LEEDS & NORTHRUP CO. SCIENTIFIC ELECTRICAL RESISTANCE GALVANOMETER

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1915-1923 RARE ANTIQUE SCIENTIFIC AMERICANA INSTRUMENT - SIGNED "LEEDS & NORTHRUP CO. " PHILADELPHIA 'ELECTRICAL RESISTANCE GALVANOMETER' LABORATORY TESTING INSTRUMENT in ORIGINAL OAK BOX. This is a rare antique signed "Leeds & Northrup Co." scientific instrument that tests and determines electrical resistance. The origins of this company began with Morris E. Leeds, who in 1899 founded the "Morris E. Leeds & Co.". In 1903 Leeds takes Dr. Edwin F. Northrup into partnership and the firm's name changes to "Leeds & Northrup Co." and became the premier maker of quality scientific laboratory testing instruments such as electrical measurement apparatuses, bridges, and galvanometers such as the one offered here. The instrument is signed with a metal plaque which has company name & serial numbers to aid in dating of piece, it reads: LEEDS & NORTHRUP CO. PHILADELPHIA PATENTED SER. NO. 89069 MADE IN U.S.A. (please see close-up pic included). The box measures approx. 9" long x 4.5" tall x almost 4" wide. Please bear with me as I do my best to attempt to describe this scientific instrument as I am no expert so my description may be somewhat crude, please rely mostly on pics to describe the piece: the instrument has a microscope-looking device at top which has a metal top which can be removed and slid up for focusing I believe (see close-up pic read more

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