1. 1885. Electromagnetic induction and its propagation. Electrician, January 3and later
2. 1888. Electromagnetic waves. Phil. Mag., February part I. § 7
3. 1885. Electromagnetic induction. Electrician, December 18and January 1, 1886
4. 1888. Electromagnetic waves. Phil. Mag., October
5. These f's are the same as in my paper On electromagnetic waves Phil. Mag. February 1888 8but s there is σ here