THE WEIGHT OF A FALLING DROP AND THE LAWS OF TATE. THE DETERMINATION OF THE MOLECULAR WEIGHTS AND CRITICAL TEMPERATURES OF LIQUIDS BY THE AID OF DROP WEIGHTS. II

J. Livingston R. Morgan, Eric Higgins
1908 Journal of the American Chemical Society  
Object of the Investigation. I n a recent paper2 it was shown that the weight of a drop of liquid falling from a properly constructed tip is proportional, for any one diameter of tip, to the surface tension of the liquid; and, further, that when falling drop weights are substituted for surface tensions in the formula of Eotvos, as modified and presented in two forms by Ramsay and Shields, the molecular weights and critical temperatures of liquids can be calculated with an accuracy equal t o
more » ... uracy equal t o that attained by the use of the surface tensions from the capillary rise. The object of this paper is to present the results obtained with the same beveled tip, as was used in the former work,3 when attached to a capillary burette of smaller internal diameter than was then obtainable, the drop weights being determined a t or near those temperatures a t which the surface tensions (from capillary rise) have been measured, thus avoiding the possible errors due to the faulty interpolation of the surface tensions from the smoothed curves, which might have affected the previous comparison. The results of our work, it may be said here, have not only confirmed the conclusions of Morgan and Stevenson in every respect, ' Extract from the Dissertation of Eric Higgins. ' Morgan and Stevenson, T H I S JOURNAL, 30, 36-376 (1908). a LOC. cit., page 368.
doi:10.1021/ja01949a001 fatcat:ec3tkzzairbq7bqxmwlpmqj6za