MEASUREMENT OF POTENTIAL DIFFERENCE 301 



References 



1. "The Accurate Measurement of Alternating and Multiphase Cur- 

 rents," G. L. ADDENBROOKE, The Electrician, vol. 45, 1900, p. 901. "The 

 Electrostatic Wattmeter, Its Calibration and Adaption for Polyphase 

 Measurements," The Electrician, vol. 51, 1903, p. 811. "Ein neues Quad- 

 rantenelektrometer fiir dynamische Messungen," H. SCHULTZE, Zeit. fur 

 Instrumentenkunde, vol. 27, 1907, p. 65. For a more complete theory of the 

 quadrant electrometer together with an experimental investigation of the 

 instrument, using continuous potentials see " Elektrometrische Unter- 

 suchungen," E. ORLICH, Zeit. fur Instrumentenkunde, vol. 23, 1903, p. 97. 

 For a discussion of the instrument as used in power measurements at the 

 Xational Physical Laboratory see "The Use of the Electrostatic System for 

 the Measurement of Power," C. C. PATTERSON, E. H. RAYNER, C. A. 

 KINNKS, Journal Institution of Electrical Engineers, vol. 51, 1913, p. 294. 

 A valuable bibliography concerning the electrometer is included. "Quad- 

 rant Electrometers," W. E. AYRTON, J. PERRY and W. E. SUMPNER, Phil. 

 Trans., vol. 182, 1891, p. 519. 



2. "A 200,000-volt Electrostatic Voltmeter," A. W. COPLEY, Electric 

 Journal, vol. 7, 1910, p. 984. 



3. Standardization Rules, American Institute of Electrical Engineers, 

 edition of October, 1916, p. 52. 



4. "Dielectric Phenomena in High-voltage Engineering," F. W. PEEK, 

 JR., McGraw-Hill Book Co., 1915. "The Sphere Gap as a Means of Meas- 

 uring High Voltage," F. W. PEEK, JR., General Electric Review, vol. 16, 1913, 

 j). 286. Also Trans. American Institute of Electrical Engineers, vol. 32, 

 I'.ti:;, part I, p. 812. 



5. "The Dielectric Strength of Air," ALEXANDER RUSSELL, Proc. Physical. 

 Society of London, vol. 20, 1905-07, p. 49. "Alternating-current Spark Po- 

 tentials and their Relation to the Radius of Curvature of the Electrodes," 

 J. DE KOWALSKI and J. U. RAPPEL, Phil. Mag., vol. 18, 1907, p. 699. 



6. "The Sphere Spark Gap," S. W. FARNSWORTH and C. L. FORTESCUE, 

 Trans. American Institute of Electrical Engineers, vol. 32, 1913, part I, p. 

 733. 



7. "Calibration of the Sphere Gap Voltmeter," L. W. CHUBB and C. 

 FORTESCUE, Trans. American Institute of Electrical Engineers, vol. 32, 1913, 

 part I, p. 739. (See also the subsequent discussion, pp. 812-831.) 



8. "Potentiometer Installation, Especially for High Temperatures and 

 Thermo-electric Work," W. P. WHITE, Physical Review, vol. 25, 1907, p. 334. 



9. "A New Potentiometer," H. B. BROOKS, Bulletin Bureau of Standards, 

 vol. 2, 1906, p. 225. "A Deflection Potentiometer for Voltmeter Testing," 

 H. B. BROOKS, Bulletin Bureau of Standards, vol. 4, 1907-08, p. 275. De- 

 flection Potentiometers for Current and Voltage Measurements," H. B. 

 BROOKS, Bulletin Bureau of Standards, vol. 8, 1912, p. 395. "Outline of 

 Design of Deflection Potentiometers with Notes on the Design of Moving 

 Coil Galvanometers," H. B, BROOKS, Bulletin Bureau of Standards, vol. 8, 

 1912, p. 419. 



