The type of apparatus used in the present work on the vapor tension of selenium, as well as the method, is due originally to Knudsen. The apparatus in the form in which Knudsen used it was modified somewhat by Egerton. Egerton's experimental scheme has been followed essentially in the present work.
Proceedings of the Iowa Academy of Science
©1919 Iowa Academy of Science, Inc.
Dodd, L. E.
"The Sublimation Curve for Selenium Crystals of the Hexagonal System,"
Proceedings of the Iowa Academy of Science, 26(1), 509-511.
Available at: https://scholarworks.uni.edu/pias/vol26/iss1/50