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.'].
Footnote [41], printer's error, extra full stop after reference, ['Comptes Rendus.'].