Pair Of Glass Capillary Viscometers – No. 1

Pair of glass capillary viscometers with U-shaped return tubing, spherical and oval bulbs, and tube arms of different diameters. Laboratory instruments used to measure liquid viscosity. Signs of use and storage, with localised discolouration and old markings. Detail props 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.