Archives Catalog Entry
Potentiometer, international Ohm
Model # 5517. Imported by James G. Biddle, Philadelphia. With paper with notes: "Ratco Res. drifter. Rheostat drifted. Thermals in Galv. circuit." In wooden case. Manufacturer: Otto Wolff, Berlin. In pencil inside front cover: CIW [Carnegie Institution of Washington] and name Barrett[?].
LENGTH: 16 x 10.5 x 8 inches; QUANTITY: 1
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