Abstract
A pipette is used having a length of 20 cm. and a diameter of about 0.7 mm. The capacity of the tube, measured from its tip to a point above its enlarged middle portion, amounts to 1 c.c. 1 The tube is connected with a suction-pump developing from 50—100 mm. H2O; at tube is interposed so that the pressure can be measured by means of a water manometer.
The fluid, the viscosity of which is to be determined, is drawn into the pipette from a receptacle. By means of the usual method the time is recorded which elapses between the dipping of the pipette into the liquid and the moment when the fluid passes the mark above the bulb. A comparison is then made between this value and the value previously obtained for distilled water, the latter being regarded as 1. The experiments are performed at room temperature.
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