Youth's Magazine,  9 (1836), 139.

Cannon Clock

Anon

Genre:

Miscellaneous

Subjects:

Invention, Light


    Describes a contrivance 'in the gardens of the Palais Royal and the Luxembourg, at Paris' in which a 'burning-glass is fixed over the vent of a cannon, so that the sun's rays at the moment are concentrated by the glass, on the priming, and the piece is fired'.



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