Pacific service magazine . ugh to the secondary and from there to the washbox. This new design of gen-erator had a capacity of 3,000,000 cubicfeet per day, and it was such a success thata second generator was installed in themonth of February, 1907, giving the plantan output of 12,000,000 cubic feet daily,including the Independent. At this timethe coal benches and gas machines that had ibeen installed in 1885 and 1888 were!eliminated from service to again give wayjto a more modern method. In the same year the fuel supply for theIndependent gas plant was changed fromcoal to lampblack. Lampblack
Pacific service magazine . ugh to the secondary and from there to the washbox. This new design of gen-erator had a capacity of 3,000,000 cubicfeet per day, and it was such a success thata second generator was installed in themonth of February, 1907, giving the plantan output of 12,000,000 cubic feet daily,including the Independent. At this timethe coal benches and gas machines that had ibeen installed in 1885 and 1888 were!eliminated from service to again give wayjto a more modern method. In the same year the fuel supply for theIndependent gas plant was changed fromcoal to lampblack. Lampblack is a by-product of oil-gas generation, and by usingit as fuel our company found a means todispose of it. During the year 1908 it was foundnecessary to install two additional sixteen-foot diameter oil gas generators to takecare of the increased demand, and with thisadded equipment the plant was capable ofgenerating 15,000,000 cubic feet per taking a step forward, in the year1915 two improved oil-gas generators, a. The late Mr. John A. Britton starting the first installation of the improved oil-gasgenerating process at the Potrero plant, 1915 Pacific Service Magazine 81 newly patented process, were were also of the two-shell type andhad a diameter of eighteen feet nine operation of these machines was en-tirely different from the sixteen-foot gen-erators, as in the latter the main valveswere hand-operated and required two mento open them, whereas in the improved oil-gas process these main valves were operatedhydraulically and required but one man foroperation. From the picture you can getan idea of the method of control as well asan inside view of these generators, whichare operated on a heat and make cycle,approximately four runs per hour. Thesegenerators each had a daily capacity of5,000,000 cubic feet and at this date (1915)gave the plant a total capacity of 22,000,-000 cubic feet. The Independent water-gas generators were then shut down an
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