- pendulum accelerometer
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- The pendulum accelerometer. Alfred W. Porter. Knowledge and Scientific News.Vol. 2 No. 10 (September 1905): 229–230.
- A Mechanical Accelerometer from 1904, History of Sensors, sensorland.com
- The Physics of Bird Flight: An Experiment. Michael D. Mihail, Thomas F. George, Bernard J. Feldman. The Physics Teacher. Vol. 46, (March 2008): 155–157.