1805. C. Hatchett, in Phil. Trans., XCV. 220. [Phenomena] attendant on etherification.
1833. Penny Cycl., I. 157/1 s.v. Æther, During the etherification of the alcohol the sulphuric acid plays an active part.
1869. Roscoe, Elem. Chem., 324. This process is called the continuous etherification process.
1881. Watts, in Nature, XXV. 50. The experiments of Williamson on Etherification.