More frames and borders from A Booklet of designs, issued by Will Bradley’s art service for advertisers, New York, circa 1914.
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Decorative borders with characters, from A Booklet of designs, issued by Will Bradley’s art service for advertisers, New York, circa 1914.
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Humorous designs from A Booklet of designs, issued by Will Bradley’s art service for advertisers, New York, circa 1914.
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Improved dissecting single microscope. Price . . $50 00
Stand with complete sliding and revolving stage-plates; one arm to carry the lenses, with rack and pinion adjustment; side condenser on lengthening arm ; mirror with complete adjustments; two single lenses and two Coddingtons 3/4 and 1/2 inch focus, the whole packed in a strong mahogany case.
The college microscope, from James W. Queen & Co’s Priced and illustrated catalogue of optical instruments, Philadelphia, 1870.
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Optical toys :
parlor kaleidoscope and zoetrope or wheel of life - a mechanical and optical toy affording amusement to old and young. It is an exemplification of persistance of vision, and is a valuable aid in illustrating the wonders of optics. The turning of the drum or cylinder brings into view the varying form or position of a figure in rapid succession, until they blend into a perfect image full of motion and natural action. By placing the apparatus in a suitable light, a number of people can examine it at the same time.
From James W. Queen & Co’s Priced and illustrated catalogue of optical instruments, Philadelphia, 1870.
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Stereoscopes, from James W. Queen & Co’s Priced and illustrated catalogue of optical instruments, Philadelphia, 1870.
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Steel eye-glasses, from James W. Queen & Co’s Priced and illustrated catalogue of optical instruments, Philadelphia, 1870.
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