have been not less than 8 per cent.; or, if they have been for one year 8 per cent., and for two years 7 per cent., and it shall be proven to the satisfaction of the Commission, that any due and proper measure of economy, to which the attention of the officers was called in writing has been wilfully neglected, or that any uncalled for and manifestly extravagant expenditures have been entered into during that time, then it shall be the duty of the Commission to lower the rates. If it shall be found that for one year the net earnings have been less than 3½ per cent., and for two years less than 4½ per cent., unless it shall be proven that this deficit has been fostered by neglect of due economy, or by extravagant expenditure as aforesaid, the rates shall be raised. In all cases where rates are readjusted, it shall be the endeavor of the Commission to set them at such a point that the net earnings will equal 6 per cent. on the capital stock."
The provision requiring two years of excess or deficiency before a change, would be necessary to avoid the fluctuations which occur in single seasons. Every