1751. Watson, in Phil. Trans., XLVII. 203. Stream of electrified effluvia.
1834. Mrs. Somerville, Connex. Phys. Sc., xxviii. (1849), 314. Attraction between electrified and unelectrified substances.
1881. Maxwell, Electr. & Magn., I. 32. No force, either of attraction or of repulsion, can be observed between an electrified body and a body not electrified.