A Critical Study of the Response of Manometers to Forced Oscillations

Abstract

A new pump has been designed to generate a sinusoidal pressure, or flow, of constant amplitude up to 90 c/s. Some of the technical problems of this design are discussed, and compared with other pumps that have been used. The cause of possible errors in manometric measurement is discussed with emphasis on the necessity for the scrupulous elimination of any trace of air bubbles.