[Gutenberg 46714] • Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives / Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Pure Science of Columbia University

Excerpt from Synthesis of 2-Methyl-4-Selenoquinazolone, 2-Phenylbenzoselenazole, and Its Derivatives: Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Pure Science of Columbia University

The question of the vulcanization of rubber also should be considered. Some experiments have been published claiming the similarity of the action of selenium and sulphur on rubber (4, The cost need not be prohibitive, since the supply could be easily increased and the price reduced provided there were a demand. In the personal experience of the writer, when work ing with the hydrogen selenide gas, the rubber connections of the apparatus soon turned red, and after a few hours were soclear a red that visitors to the laboratory imagined that the writer was using the ordinary red rubber connections. The rubber thus changed seems to be softer and more elastic than the original; this observation will be followed up.

In this country the National Research Council has created a special committee of seven to investigate the various possible uses of selenium and tellurium.

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