. Water & sewage works . n with the 42-inch main drain, a valve in the 6-inchforce main is opened and the water isforced by the pump back thru the fil-ter stone from below and runs off thruan outlet channel at a level high enoughto discharge into the settling tanks. Oneor more of the roughing filter units maybe cleaned at a time. In the photograph a settling tank isseen in the left foreground. Beyond aretwo rows of the roughing filters, with in-let channel between, and the pump and gatehouse at the left end: still fartherbeyond are four rows of settling tankunits: another double row of roughin
. Water & sewage works . n with the 42-inch main drain, a valve in the 6-inchforce main is opened and the water isforced by the pump back thru the fil-ter stone from below and runs off thruan outlet channel at a level high enoughto discharge into the settling tanks. Oneor more of the roughing filter units maybe cleaned at a time. In the photograph a settling tank isseen in the left foreground. Beyond aretwo rows of the roughing filters, with in-let channel between, and the pump and gatehouse at the left end: still fartherbeyond are four rows of settling tankunits: another double row of roughingfilters, with its pump and gatehouse andfour more rows of settling tank units. Inthe background is a view of a small por-tion of the sprinkling filter area. The portrait cut shows Dr. Imhoff inthe center, R. M. Clayton, the superin-tendent of construction of Atlanta, on hisleft and W. A. Hansell, Jr., the assistantengineer, who is in charge of the designand construction of sewers and sewagedisposal plants, on his G RIT CHAMBER, Peachtree Creek Sewage DisposalPlant, Atlanta. Ga. December, l$n STREET LIGHTING WITHTUNGSTEN LAMPS This londcnsation of a paper, for whichIff arc indebted to the editor of the Gen-eral Electric Revieic. states the six neces-saries of good lighting effects and meth-ods of obtaining them under the marvel-ously improved modern conditions in theelectric lighting field. UNTIL recently the success of a streetlighting system was too oftenjudged only by the brightness ofthe individual units, but now, thanks tothe better general knowledge of the sub-ject, the merits of a lighting system aredetermined by the amount of light ratherthan by the brightness, and also by theproper distribution. Indeed, the art ofillumination has made such rapid prog-ress that today, in up-to-date communi-ties, a good lighting system is consideredas essential as is a good police systemand an efficient fire fighting force. The economic and scientific aspects ofthe problem are da
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsewerage, bookyear191
