Jaquerod, C. R. p. 789, 1904.

Ramsay and Travers, Zeitsch. Physik. Chem. 25, p. 568, 1898.

Ramsay, Nature, April 7, 1904.

Lodge, Nature, June 11, p. 129, 1903.

Larmor, Aether and Matter, p. 233.

J. J. Thomson, Phil. Mag. p. 681, Dec. 1903.

Lord Kelvin, Phil. Mag. Oct. 1904.

Thomson, Phil. Mag. March, 1904.

Rutherford and Soddy, Phil. Mag. May, 1903.

See Strutt and Joly, Nature, Oct. 15, 1903.