- Joseph F. Keithley The story of electrical and magnetic measurements: from 500 B.C. to the 1940s, John Wiley and Sons, 1999 ISBN 0-7803-1193-0, pp. 196-198
- Tangent Galvanometer
- Greenslade, Thomas. "Instruments for Natural Philosophy — Astatic Galvanometer". Kenyon College. Retrieved 2010-12-19.
- http://www.slideshare.net/rameezahmad4/galvanometer-10411785?related=1
- http://en.wikipedia.org/wiki/Galvanometer