ABSTRACTS OF TECHNICAL ARTICLES 1261 



Hopper, H. G., see J. K. Galt. 

 HoRNBECK, J. A., see J. R. Haynes. 



Hughes, W. T/ and J. J. Lander^ 



Vacuum Tube Electrometer Amplifier, Rev. Sci. Instr. 24, pp. 331- 

 332, Apr., 1953. 



Kersta, L. G.^ 



Interesting Property of Certain Conductive Rubbers. Letter to the 

 Editor. J. Polymer Sci., 10, pp. 447-448, Apr., 1953. 



KocK, W. E.' • 

 Acoustic Gyrator, J. Am., Acoust. Soc. 25, p. 575, May, 1953. 



KocK, W. E.' 



Acoustic Gyrator, Arch. Elektr. tjbertragung, 7, p. 106, Feb., 1953. 



A gyrator for acoustic waves is described which is the analog of the ferrite 

 gyrator for microwaves described by C. L. Hogan. The required non-re- 

 ciprocal rotation of the plane of polarization of transverse acoustic waves 

 propagating in a tube is accomplished by rotating the tube at high speed. 



KocK, W. E.' 



Ahnlichkeit zwischen Vokalformanten und Formanten von Musik- 

 instrumenten (Similarity Between Vowel Formants and the Formants 

 of Musical Instruments), (in German), E.T.Z., 74, p. 166, Mar. 1, 

 1953. 



KoHMAN, G. T., see M. G. Wooley. 



KooNCE, Miss S. E.,^ AND S. M. Arnold^ 



Growth of Metal Whiskers. Letter to the Editor, J. Appl. Phys., 24, 

 pp. 365-366, Mar., 1953. 



Lander, J. J., see W. T. Hughes. 



Luke, C. L.^ 



Photometric Determination of Antimony in Lead Using the Rhodamine 

 B Method, Anal. Chem., 25, p. 674, Apr., 1953. 



» Bell Telephone Laboratories. 



