Piezo-Electricity

Abstract

In 1921 W. G. Cady proposed the use of quartz vibrators piezo-electrically excited at their resonance frequency for stabilizing radio installations, and thus originated the new industry of piezo-electric engineering which has employed thousands of workers on the manufacture of millions of stabilizers and oscillators. Cady had been interested in piezo-electricity before, and had studied in particular the piezo-electric properties of Rochelle salt, and ever since, he and his school at Wesleyan University have never ceased investigating the subject. This treatise, long awaited by his numerous colleagues and friends, embodies the experience not only of the author and of his school, but also of other workers in the field, and will earn him the gratitude of all interested in crystal physics.