Seven engraved illustrations describing the science behind a variety of Optical and Image-making Machines, including a portable Camera Obscura, a Binocular Telescope, and various Magic Lanterns; a Simple Tin Instrument, with a small flame which casts light and an adjustable tube to change the size of the projections; Plate 57 / 'Book III of A Compleat System of Opticks.' [William Hooper]; "Rational Recreations: In which the Principles of Numbers and Natural Philosophy are Clearly and Copiously Elucidated, by a Series of Easy, Entertaining, Interesting Experiments." (London-England), 1774.
Source: rc.umd.edu
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