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Of the following papers, those marked * were read. *93. '(A laboratory method for the preparation of ethylene." By G. S. Newth. By substituting tribasic phosphoric acid for sulphuric acid in the ordinary process for obtaining ethylene, this gas may be prepared in a high state of purity, Syrupy phosphoric. acid is boiled in a flask until the temperatnre reaches ZOO' , when ethyl alcohol is delivered drop by drop to the bottom of the boiling liquid. If the temperatiire is maintained about 220°, adoi:10.1039/pl9011700147 fatcat:xfzmxvk5yrbd5kg3emj37hqrj4