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Jump to: Page of text headed 'Optical Toy Sports' with illustrations of Helmholtz top and wintry scene with penny-farthing bicycle
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Page of text headed 'Optical Toy Sports' with illustrations of Helmholtz top and wintry scene with penny-farthing bicycle

, Dr Scoffern (1881-2) Page of text headed 'Optical Toy Sports' with illustrations of Helmholtz top and wintry scene with penny-farthing bicycle. [Image]
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