1. A discourse delivered at the Royal Institution on February 4.
2. "Das Psychogalvanische Reflexphenomen". (Berlin, 1900).
3. "The Galvanometric Measurement of Emotive Physological Changes". roceedings of the Royal Society, B, vol. xc., p. 214, 1917.
4. Mary D. Waller, "The Emotive Response of Class of Seventythree Students of Medicine measured in Correlation with the Result of a Written Examination", Lancet, April 6, 1918.