“ They may be prepared by the action of concentrated sulphuric acid on the alcohols, alkyl sulphuric acids being first formed, which yield ethers on heating with alcohols. The process may be made a continuous one by running a thin stream of alcohol continually into the heated reaction mixture of alcohol and sulphuric acid. ”

“ It combines with hydrochloric acid gas to form a compound (CH3) 2O·HCl (C. Friedel, Comptes rendus, 1875, 81, p. 152) . Methyl ethyl ether, CH3·O·C2H5, is prepared from methyl iodide and sodium ethylate, or from ethyl iodide and sodium methylate (A. W. Williamson, Ann., 1852, 81, p. 77) . ”