ACOUSTIC IMPEDANCE. 39 



10. A. E. Kennelly and H. O. Taylor. 



" Some Properties of Vibrating Telephone Diaphragms." 

 Proc. Am. Phil. Soc, April, 1916, Vol. 55, pp. 415-460, 

 Bulletin No. 11, Research Dii\, El. Eng'g. Dept., Mass. 

 hist. Tech. 



11. A. E. Kennelly. 



" The Application of HyperV)olic Functions to Electrical 

 Engineering Problems." New York. The McGraw-Hill 

 Book Co., 1916. 



12. J. A. Fleming. 



" The Principles of Electric Wave Telegraphy & Telephony." 

 Third Edition, Longmans Green and Co., 1916, p. 347. 



13. A. E. Kennelly. 



" Artificial Electric Lines; their Theory, Mode of Construction 

 and Uses." McGraw-Hill Book Co., 1917. 



14. A. E. Kennelly. 



" Some Experiments on the Effects of Changes in Diaphragm 

 Thickness on the Characteristics of a Telephone Receiver." 

 Journal of the Franklin Institute, November, 1917, Vol. 184, 

 pp. 723-726. 



15. I. B. Crandall. 



"The Air-damped Vibrating System: Theoretical Calibration 

 of the Condenser Transmitter." Physical Review, 1918, 

 pp. 449. 



16. A. E. Kennelly and H. Nukiyama. 



" Electromagnetic Theory of the Telephone Receiver, with 

 Special Reference to Motional Impedance." Proc. A. I. 

 E. E., March, 1919. Bulletin No. 17, Research Div., El. 

 Eng'g. Dept., Mass. Inst. Tech. 



17. Louis V. King. 



" On the Determination of the Electrical and Acoustic Char- 

 acteristics of Telephone Receivers." Journal of the Franklin 

 Institute, May, 1919, pp. 613-625. 



18. W. Hahnemann and H. Hecht. 



" Der Mechanisch-Akustische Aufbau eines Telephons." An- 

 nalen der Phijsik, 1919, No. 21, pp. 454-480. 



19. H. Mori. 



" Study of Motional Impedance in Receivers." The Denki 

 Ilyoron, Vol. VIII, 1920, Nos. 1, 2 & 3. 



20. C. V. Drysdale. 



" The EIcA-enth Kelvin Lecture." Journal of Institution of Elec- 

 trical Engineers. July, 1920, Vol. 58, p. 591. 



