Linearized Theory of Steady High-Speed Flow By Prof. G. N. Ward. (Cambridge Monographs on Mechanics and Applied Mathematics.) Pp. xv + 243. (Cambridge: At the University Press, 1955.) 30s. net.

This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive. It relies on the relationship between airspeed (AF) and thermal impedance (ZT = o C/W) of a heated ...