Bunsen's classical experiments on the absorption of gases by liquids show that the coefficient of absorption in water and alcohol between 0° and 20° diminishes as the temperature rises. Bohr and Bock found that at higher temperatures the coefficients of some gases (hydrogen and probably nitrogen) pass through a minimum, hydrogen in water at 60° C, nitrogen not far from 100° C. These results were not confirmed by Winkler, who concluded from his experiments that the coefficient approaches a smallest value asymptotically. Recently Estreicher, working with Professor Ramsay, found a minimum in the solubility for helium in water at 25° C.