INVENTOR OF THE THERMOS OR VACUUM FLASK
SIR JAMES DEWAR (1842-1923) HANDWRITTEN QUOTE SIGNED, “James Dewar”, on a 5 x 2.5 card, 6 Feby 1905, by the British chemist and physicist best know for inventing the vacuum flask (1892) which he used in conjunction with research into the liquefaction of gases. He also studied atomic and molecular spectroscopy. Quote in full: An ordeal to be undergone…With a triumph to be achieved”. The idea occurred to him of using vacuum-jacketed vessels for the storage of liquid gases – the Dewar flask (otherwise known as a Thermos or vacuum flask) - the invention for which he became most famous. The Thermos was very efficient at keeping the heat out. He did not patent his invention so he did not profit from the widespread adoption of his vacuum flask. In 1905, the date of this quote, he began to investigate the gas absorbing powers of charcoal when cooled to low temperatures and applied his research to the creation of high vacuum, which was used for further experiments in atomic physics. This rare autograph is in fine condition, with minor age toning.