Copy letter from Robert William Frederick Harrison, to Professor Ernest Rutherford, and R K McClung, McGill University, Montreal States the title of Rutherford and McClung's paper, 'Energy of Rontgen and Becquerel Rays and the Energy required to produce an Ion in Gases' [presumably concerning publication]. Draws attention to the desirability of stating 'calories per second' whenever this is meant. Consistent nomenclature would make the paper more intelligible to the reader. In many places 'power' might be substituted for 'energy'. 1 October 1900