Measurements have been used on telephone and television facilities since 1940 to locate impedance irregularities and control quality in manufacture and installation.
Quate experimental verification, that barium - strontium oxide, as used in the oxide cathode, is an excess electronic semi-conductor.
Electronics, March 1943. Proc. I.R.E., February 1943.
F. F. SHIPLEY. A new crossbar toll switching system was placed in service in Philadelphia in August 1943. Important improvements offered by this system include: 1.
A.S.T.M. Bulletin, M a y 1945. Quarterly Applied Mathematics, July Electronic Industries, August 1945. 1945.
Indus. & Engg. Chemistry, March 1946. Proc. I.R.E., M a y 1946. *Elec. Engg., Trans. Sec., April 1946. 4 Phil. Mag., June 1945.
Cent nickel), tension (ff) decreases resistivity, and magnetic field (H) increases it.
J. R. E., February 1948. I. R. E., February 1948. Proc. I. R. E., February 1948. Proc. I. R.E., March 1948.
* A. I.E. E. Transactions, v. 67, pt. 1, pp. 557-561, 1948. 596 Electrical Engineering, v. 68, pp. 215-221, March 1949. Metal Progress, November 1948. Proc. I. R. E., v. 37, pp.
Elec. Engg., Transactions Section, April 1942. Jour. S.M.P.E., February 1942. 75 76 BELL SYSTEM TECHNICAL JOURNAL in the theater from one or more sound-tracks.
