Key points are not available for this paper at this time.
The coefficient of absorption (2αν−2) of ultrasonic waves was measured by a radiation pressure method at frequencies from 7 to 50 Mc. The average value is given for each frequency. These cluster closely around 43.1 × 10−17, and there is no indication of a drop in 2αν−2. Errors entering into absorption measurements are discussed.
Fox et al. (1941) studied this question.