Bush, V., and S. H. Caldwell, Thomas-Fermi Equation Solution by the Differential Analyzer, Physical Review, vol. 38, no. 10, 1931, pp. 1898-1902.
Hartree, D. R., A Great Calculating Machine: the Bush Differential Analyser and Its Applications in Science and Industry, Proceedings of the Royal Institution of Great Britain, vol. 31, 1940, pp. 151-170.
Hartree, D. R., and A. Porter, The Application of the Differential Analyser to Transients on a Distortionless Transmission Line, Journal of the Institute of Electrical Engineering, vol. 83, no. 503, Nov. 1938, pp. 648-656.
Hartree, D. R., and J. R. Womersley, A Method for the Numerical or Mechanical Solution of Certain Types of Partial Differential Equations, Proceedings of the Royal Society of London, series A, vol. 161, 1937, pp. 353-366.
Maginniss, F. J., Differential Analyzer Applications, General Electric Review, vol. 48, no. 5, May 1945, pp. 54-59.
Shannon, Claude E., Mathematical Theory of the Differential Analyzer, Journal of Mathematics and Physics, Cambridge, Mass.: Massachusetts Institute of Technology, vol. 20, no. 4, 1941, pp. 337-354.
HARMONIC ANALYZERS AND SYNTHESIZERS
Another branch of the analogue calculating machine is the harmonic analyzer and synthesizer. These are machines that study wave motions and related physical and mathematical functions. A brief list of articles on this type of machine follows:
Archer, R. M., Projecting Apparatus for Compounding Harmonic Vibrations, Journal of Scientific Instruments, vol. 14, 1937, pp. 408-410.
Brown, S. L., A Mechanical Harmonic Synthesizer-Analyzer, Journal of the Franklin Institute, vol. 228, 1939, pp. 675-694.