A small-volume viscometer has been developed for measuring the viscosity of lubricating oils in the 40-140A degrees cut range. A description is given of the viscometer's principle of operation, which consists of measurement of the length of time that a ball is immersed in the test oil inside a beaker. The time (rate) of motion of the ball in the liquid is measured and recorded by a digital indicator. The results of calibration and measurement of the viscosity of various oils are reported.