THIS book is devoted to measurements in vibratory motion, sound, heat, electricity and magnetism. Practical details are preceded by a theoretical treatment which should enable the student to understand what he is doing. The considerable space allocated to the theory of damped vibrations and the logarithmic decrement is welcome in view of their importance in relation to alternating currents, though in this connexion it is a pity that the theory of forced vibrations has not been included.
A Handbook of Physics Measurements.
, in collaboration with O. W. Silvey, G. W. Sherman, Jr., D. C. Duncan and R. B. Abbott. Vol. 2: Vibratory Motion, Sound, Heat, Electricity and Magnetism. Third edition. Pp. xi + 277. (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1929.) 12s. 6d. net.