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Thomas Graham, Scottish chemist

Thomas Graham, Scottish chemist

C036/8767

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20.1 x 30.0 cm ⏐ 7.9 x 11.8 in (300dpi)

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GARY BROWN / SCIENCE PHOTO LIBRARY GARY BROWN / SCIENCE PHOTO LIBRARY

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Thomas Graham (1805-1869). Caricature of the Scottish chemist Thomas Graham. Graham is best known for his studies on the diffusion of gases, which resulted in 'Graham's Law' (the rate of effusion of a gas is inversely proportional to the square root of its molar mass). He founded the study of colloids and showed they could be separated by a process of dialysis. His dialyzer was the precursor to today's dialysis machines, crucial to the management of kidney failure. He was elected fellow of the Royal Society in 1836.

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