Paul Wainwright creates stunning images on the gigantic harmonograph he constructed in his New Hampshire barn The following contraption is a prototype of a drawing machine that was fashionable in the ...
I TRUST I may be pardoned for observing, in reference to Prof. A. M. Mayer's description of the curves produced by Blackburn's Double Pendulum (NATURE, vol. xviii. p. 594), that a typical series of ...
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