A FOURTH volume describing the researches of Prof. Carl Barus with interferometers has recently been issued. The classical work of Fizeau, who applied interference methods to the determination of expansion coefficients, directed attention many years ago to the possibility of the kind of work which has been so well developed by Michelson and others, and in the present series of papers Prof. Barus seeks to develop the methods of application of the interferometer to a somewhat wide range of physical measurements. These include spherometer measurements, elastic deformation of small bodies, elongations due to magnetisation, pressure variation of specific heat of liquids, and even electrodynamometry. The remainder of the volume deals with various modifications of the interferometer methods and with certain gravitational experiments.
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M., L. The Interferometer in Physical Measurements1. Nature 105, 563 (1920). https://doi.org/10.1038/105563a0