Barlow's Wheel

I recently discovered Barlow's Wheel and had to share it with you. It reminds me so much of Ed's experimenting with U shape magnets.

And to further add, Peter Barlow (born 1776) published mathematical books that were regularly reprinted until 1965 , when computers rendered them obsolete.

He made an important contribution to astronomy by inventing the Barlow Lens. Peter Barlow was awarded a medal for correcting a deviation in ship mounted compasses caused by iron in the hull of these ships. Also see Balrow's Law also see Samuel Hunter Cristie.

Barlow made several contributions to the theory of the strength of materials.

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