Inconsistent hyphenation of word, 'over-blowing' and 'overblowing' both present in original text. Page 5, possible printer's error, a for at, 'consisting when a rest'. Page 6, printer's error, comma rather than full stop at end of sentence, 'ether constituting electric radiation,'. Page 10, printer's error, millmetre for millimetre, 'three thousand volts per millmetre,'. Page 13, possible printer's error, set for sets, 'there are three set of phenomena'. Page 13, printer's error, duplicate word, 'detached and and travel away.'. Page 13, brackets added to in-line equation to aid clarity, 'F = (3/8)CV^{2}/10^{6}.'. Page 13, both equations originally multi-line fraction, rendered into one line for clarity. Page 15, both equations originally multi-line fraction, rendered into one line for clarity. Page 22, printer's error, correponding for corresponding, 'correponding to this frequency'. Page 22, printer's error, consist for consists, 'due to Braun, consist of attaching'. Page 24, printer's error, one-hundreth for one-hundredth, 'capacity of one-hundreth of a microfarad,'. Page 28, printer's error, missing full stop at end of sentence added, 'in the case of the hammer break.'. Page 33, printer's error, supppse for suppose, 'Let us supppse'. Page 44, equation originally multi-line fraction, rendered into one line for clarity. Page 46, printer's error, comma rather than full stop at end of sentence, 'to the transmitting aerial,'. Page 48, possible printer's error, alterations for alternations, 'alterations of electric strain'. Page 54, printer's error, Banly for Branly, 'proved that in a Banly tube,'. Page 56, variation in spelling, unsensitive for insensitive, 'wounded and unsensitive.'. Page 59, possible printer's error, sensive for sensitive 'to work a sensive recording apparatus'. Page 59, possible printer's error, arragement for arrangement, 'most interesting arragement'. Page 61, printer's error, missing letter i, 'as shown n Fig. 18,'. Page 70, equation originally multi-line fraction, rendered into one line for clarity. Page 71, printer's error, osciilating for oscillating, 'to that of the osciilating circuit'. Page 71, printer's error, impluse for impulse, 'the period of that impluse'. Page 74, possible printer's error, extra comma in date, 'on May, 17, 1901.'. Page 76, printer's error, arangements for arrangements, 'variation of the above arangements'. Page 77, printer's error, systonic for syntonic, 'the systonic transmitting'. Page 86, printer's error, interpositon for interposition, 'effect of the interpositon of land'. Page 87, printer's error, signaling for signalling, 'the usual maximum signaling'. Footnote 17, printer's error, missing letter t, 'must be _solid_ metal and no hollow,'. Footnote 31, printer's error, missing full stop after abbreviation, '_Phil Mag._'.