STUDIES IN VAPOR PRESSURE: III. A STATIC METHOD FOR DETERMINING THE VAPOR PRESSURES OF SOLIDS AND LIQUIDS.¹

Abstract

sixteen of the alloys investigated a transformation point was noted (in addition to the three freezing points) at a fixed temperature, approximately 124~. In every instance observed the transformation took place below the temperature a t which binary eutectic had begun freezing. The phenomenon was not noticed early in the investigation, and the data at hand are not sufficient to enable me to fix the limits of composition within which the change takes place. If the halt is caused by the formation in the partly-solid alloy of a binary or ternary compound, the extent to which this compound may form mix-crystals with the three pure metals will decide whether it is necessary to introduce another surfaceroughly triangular in outline-at the point now assigned to the ternary eutectic. I intend to resume the investigation of the transformation a t an early date, and ask for a reasonable time reservation for this purpose.

Thermodynamic Properties of Octamethylcyclotetrasiloxane

“…The sample purity was estimated to be 99.82% on the basis of a melting point measurement. For the vapor pressure measurements, a modified isoteniscope reported by Smith and Menzies, 61 which is categorized as a static method, was used. No information is given about the experimental uncertainties.…”

The effect of humidity and temperature on the equilibrium moisture content of powders

“…The apparatus used was essentially that of Smith & Menzies (1910) except that a larger bulb was used. Values were obtained at 25", 30", 40" and 50" for lactose, dextrose, sucrose and hexamine.…”

Vapor Pressures

“…The original design of Smith and Menzies 163 and a modification used by the writer are shown in Figure 4. The isoteniscope is charged with the sample, and is then attached to a manifold with a gas reservoir in which the pressure of an inert gas can be adjusted and maintained constant.…”