Thomas Graham was a Scottish chemist. He was born in 1805 at Glasgow and died in 1869. Educated at Glasgow and Edinburgh, in 1827 he commenced teaching private mathematical classes in Glasgow, and in 1829 succeeded to the lectureship of chemistry in the Mechanics' Institution. 1830 he was appointed professor of chemistry in the Andersonian University. In 1831 he established the law that gases tend to diffuse inversely as the square root of their specific gravities. He afterwards made a series of investigations into the constitution of ar-seniates, phosphates, and phosphoretted hydrogen, and into the function of water in different salts.
In 1837 he was appointed professor of chemistry at University College, London, , and soon after settling in the metropolis he was appointed assayer to the mint, holding the post at University College until 1855 when he became master of the Mint. Thomas Graham was the first president of the Chemical Society, founded in 1841.
In 1846 he assisted in founding the Cavendish Society, over which be presided. He read the Bakerian lecture in 1849 and in 1854, the subject of both being the diffusion of liquids, which he further treated before the Eoyal Society in 1861. He distinguished the crystalloids and colloids in liquid solutions, and gave to their separation the name of dialysis, In a subsequent paper, Philosophical Transactions, 1866, he applied these discoveries to gases, under the name of atmolysis. The passage of gases through heated metal plates and the occlusion of gases were also ably investigated by him. Research Thomas Graham
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