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Published online by Cambridge University Press: 03 November 2016
The current method of founding the teaching of Theoretical Statics on the experimental proof of the “Parallelogram of Forces” seems open to grave objection. The experiment is too remote from the facts of ordinary observation; and it is not so very easily performed. Moreover, the result, when accurately obtained, appears to the pupil to be so remarkable, that it is a pity not to reserve it for use as a verification of the soundness of pure reasoning.
* This proof was in substance communicated to me by my father, the Rev. R. G. Bryan, M.A., who invented it in 1841.