[281] Picton, "Mystery of Matter," p. 49.
[282] Herschel, "Familiar Lectures on Science," p. 467.
[283] Sir William Thomson, "Papers on Electrostatics and Magnetism," p. 419.
[284] North British Review, vol. xlviii. p. 127.
[285] We do not by any means assert that two substances can not occupy the same point in space at the same moment in time. We accept the Hegelian maxim that "two substances may occupy the same point in space at the same time provided their qualities are essentially different." If the qualities of the ether are essentially different from gross matter, then to call ether "matter" is to confound and mislead the mind. May not ether be a "tertium quid" between matter and mind?
[286] Prof. Clerk Maxwell, in Nature, vol. ii. p. 421.
[287] Sir William Thomson, in Nature, vol. iv. p. 266.
[288] Sir W. Thomson, in Nature, vol. i. p. 551.
[289] Nature, vol. ii. p. 421.
[290] Philosophical Magazine, 1868.