FOOTNOTES:

[41] See his Lectures, published in the Electrician, June 22, June 29, July 6, and July 13, 1888.

[42] See paper read at the meeting of the British Association, in Bath, 1888, published in the Electrician, page 607. September 14.

[43] See a very ingenious hypothesis, to account for this phenomenon, suggested by Professor Ewing in the Electrician, p. 712. October 5, 1888.