DEWAR, James. 20343



Autograph Letter Signed, to Lord Avebury, sending him some Sulphate of Cobalt for him to use, discussing the strength of the solution. A good one page example, 7 x 4 inches. Royal Institution, 10 April 1904. Sir James Dewar (1842-1923), Scottish chemist and physicist, discovered cordite, accomplished the liquefaction of hydrogen (1898), and invented the vacuum flask.