The Osmotic Pressure of Cane Sugar Solutions at 5°

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Excerpt from The Osmotic Pressure of Cane Sugar Solutions at 5°: Dissertation, Submitted to the Board of University Studies of the Johns Hopkins University for the Degree of Doctor of PhilosophyWith reference to Tables I-XXIII it is only necessary to call attention to the fact that the series of measurements was carried out without the least trace of loss in rotation. The solution from the cell after each measurement gave the same rotation as a part of the original solution, which was saved for this purpose. Table XXIV shows the osmotic pressure, gas pressure, the difference between the two, the molecular osmotic and gas pressures, and the ratio of osmotic to gas pressure. A glance at the ratios obtained in duplicate experiments will show how good the agreement in the work has been, when it is understood that exceptional difficulties 'had to be overcome.In the and normal concentrations the difference in the ratio is not apparent in the third decimal place. In no case is the difference in the ratio greater than three in the third decimal place. In two cases the difference in the ratio amounted to three in the third decimal place. In the one case the difference in actual osmotic pressure was only' of an atmosphere, in the other still less. The more concentrated the solution the less is the ratio in¿uenced by a difference in the actual pressures measured. The largest divergence in actual pressures occurs with the normal concentration, as would be expected. Here the difference between the highest and lowest of four measurements is only of an atmosphere. In other cases, the difference is much less and in some there is no difference at all.Table XXV shows the mean values. Attention may be called to the somewhat regular way in which the ratios decrease from to normal concentration. A minimum is reached at normal, which, however, is very little lower than the ratios at and normal, which are very nearly equal. With the normal there is a notable rise in the ratio.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.