POTENTIOMETER by LEEDS & NORTHRUP CO PHILADELPHIA 74475
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POTENTIOMETER by LEEDS & NORTHRUP CO. PHILADELPHIA 744756 MADE IN U.S.A. EXCELLENT COSMETIC CONDITION, MINIMAL SCRATCHES TO WOOD CASE. PLEASE GRADE BY PHOTOS, NOT SURE HOW TO TEST ITEM, SOLD AS FOUND. This somewhat larger and newer version of the Leeds & Northrup student potentiometer above sold in 1940 for $70. It was designed for use with a Weston-type standard cell with an EMF of 1.018 V; under this condition it was direct-reading. Its slide wire and fifteen stepwise resistors could be used as two arms of a Wheatstone bridge.
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