Page:Incandescent electric lighting- A practical description of the Edison system.djvu/109

 maximum is a very fair one, and with the addition of the day load that will come on with the addition of power, it makes a model load diagram. The general run of stations shows an average for the twenty-four hours of from twenty to forty per cent. of the maximum load; the latter figure is very seldom reached. The writer knows of one station in which we have the latter figure, and where, if we eliminate one short half-hour around six o'clock, we have the remarkable showing of seventy-five per cent. average load for the twenty-four hours.

We have taken some remarkably fine indicator cards, which show the workings of the engines of the steam plant in this station. The division of work shown on the cylinders is as follows: