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 [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 [71], printer's error, osciilating for oscillating, ['to that of the osciilating circuit'].