The primary object of this paper is to record some experimental observations. During work on the vapor tension of the element selenium, above and below the melting point, where the Knudsen method of molecular flow was used, the condensed material deposited itself on the cooling tube of the apparatus in a noteworthy manner. Some numerical data on it in addition to that necessary for the vapor pressure measurements were obtained incidentally at the time of the experiments. A description of the behavior of the deposit, from run to run of the pressure measurements, is here given, partly by means of the accompanying tables, including the numerical data mentioned. The type of tube upon which the material condensed is described in the paper already referred to, on the sublimation curve.
Proceedings of the Iowa Academy of Science
©1919 Iowa Academy of Science, Inc.
Dodd, L. E.
"Some Structural Features of Selenium Deposited by Condensation from the Vapor State in the Neighborhood of the Melting Point,"
Proceedings of the Iowa Academy of Science, 26(1), 501-508.
Available at: https://scholarworks.uni.edu/pias/vol26/iss1/49