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Equipment, Diagnostic Booklet of coloured silk threads, c 1825-1844

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UIS5088996

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Equipment, Diagnostic Booklet of coloured silk threads, c 1825-1844

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Equipment, Diagnostic Booklet of coloured silk threads, c 1825-1844. This booklet of threads was used by John Dalton (1766-1844) to test his own colour blindness. It was given to him by the astronomer Sir John Frederick William Herschel (1792-1871). Most colour blindness is inherited, and affects more men than women. The condition is also known as Daltonism, and usually involves confusion between red, green and yellow. Dalton formulated the atomic theory to explain chemical reactions, based on the concept that the atoms of different elements are distinguished by differences in their weights. This theory has influenced scientific thought for more than a century and a half. ©SSPL/Science Museum

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Largest available format 3504 × 2763 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2763 px 297 × 234 mm 1.2 MB
Medium 1024 × 808 px 87 × 68 mm 779 KB

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