IN NATURE (vol. xx. p. 103) there appears an abstract of a paper by Prof. E. W. Blake on a machine for drawing compound harmonic curves. Prof. Blake is doubtless not aware that this machine is based ...

A modern CNC machine programmed to illustrate historical drawing machines? The concept alone seems custom-made to intrigue and delight meta-loving Internet denizens, but MachineDrawing DrawingMachines ...

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HARMONIC curves possess great importance, since they represent to the eye the circumstances of motion of bodies in a state of vibration, and hence apply not merely to the pendulum and to musical ...