May 5th, 2011

Scanning the Past: A History of Electrical Engineering from the Past
Submitted by Marc Bell, Editor

Copyright 1997 IEEE. Reprinted with permission from the IEEE publication, “Scanning the Past” which covers a reprint of an article appearing in the Proceedings of the IEEE Vol. 85, No. 4, April 1997.

 George W. Pierce:  Radio Pioneer and Educator

    George W. Pierce, one of the founding fathers of com¬munication engineering, was born 125 years ago this year. He served as president of the Institute of Radio Engineers (IRE) in 1918 and 1919, the only person to serve a two-year term in the 50-year existence of the IRE. He received the IRE Medal of Honor in 1929 in recognition of his contributions to the theory and applications of crys¬tal detectors, piezoelectric crystals, and magnetostriction devices. The award citation also mentioned his role as a leading educator and author of books in the electrical field. 

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    Pierce was bom in Webberville, TX. He studied under Alexander Macfarlane (known for his contributions to the theory of alternating currents) at the University of Texas, where he graduated in physics. In 1900, Pierce earned a doctorate from Harvard University for his dissertation on high-frequency electromagnetic waves. He then studied for about a year at the Boltzman Laboratory in Leipzig, Germany, before returning to Harvard where he spent the rest of his professional career.
    In one of his first researches, Pierce used a high-frequency dynamometer to measure the current distribution in a loop antenna. He verified the image theory for antennas elevated above the earth as well as over artificial grounds. He also investigated the effects of both inductance and shunt capacity tuning of receiving antennas. His wave meter (see Fig. 1) was used in wireless telegraphy applications. At resonance, a high-pitched signal was produced in the telephone receiver. After hearing reports of the good performance of carborundum radio detectors, Pierce carried out a long series of quantitative experiments on various minerals used as crystal rectifiers (Fig. 2). He was one of the first to employ the Braun cathode-ray tube indicator with a camera to obtain visual images of rectification. His findings convinced him that the thermoelectric theory was not an adequate explanation of the rectification phenomenon. He used a similar experimental setup (Fig. 3) to study electrolytic detectors and found that, in sensitivity, “the best crystal rectifiers are about equal to the electrolytic detector.” Much of his early research was reported in his classic book Principles of Wireless Telegraphy, published in 1910.

     Oscillographic apparatus and circuits for the study of Pierce became the first Director of the Cruft Laboratory at Harvard in 1914 and was elected a Fellow of the IRE in 1915. During the World War I, he was involved in investigating ultrasonic detection of submarines for the U.S. Navy. His second book, Electric Oscillators and Electric Waves, was published in 1919. He succeeded Edwin H. Hall, remembered as the discoverer of the “Hall effect,” as Rumford Professor at Harvard in 1921. Pierce also was ele’cted to membership in the National Academy of Sciences. During the 1920’s, he added piezoelectric crystals to his research agenda and invented the “Pierce oscillator,” which he patented in 1923. He also studied the magnetostriction phenomenon and received a patent on a magnetostriction oscillator in 1928. He published a technical paper on the magnetostriction oscillator in the PROCEEDINGS OF THE IRE in January 1929. In his later years, Pierce researched the sound of bats and insects and published The Song of Insects in 1948. He died in August 1956 at the age of 84.
[1] G. W. Pierce, Principles of Wireless Telegraph.   New York: McGraw-Hill, 1910.
James E. Brittain

Entry Filed under: History of Electrical Engineering


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