Glass Capillary Viscometer – No. 4

Glass capillary viscometer with U-shaped return tubing, spherical and oval bulbs, and tube arms of different diameters. Laboratory instrument used to measure liquid viscosity. Signs of use and storage, with localised discolouration and old markings. Detail prop for laboratory and chemical industry sets. The four numbered entries contain seven similar items in total, which can be combined into a grouped arrangement. Exact subtype and calibration are unverified; measurement accuracy and operation have not been tested.