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Show FERTILIZING ELEMENTS IN CITY SEWAGE. The ques:on of conserving the fertilizing fer-tilizing elements In city Fowage will soon be vital In our country. The sowago of nearly all American cities Is piped Into rivers or lakes and car-rlpd car-rlpd out Into the sea. where It is irretrievably ir-retrievably lost Spwage Is especially rich In phosphorus, which Is positively posi-tively essential to animal and vegetable vege-table life The annual loss due to the present disposition of it in our cities Is. according to A R. Whltson of the University of Wisconsin, equal to two pounds of phosphoric oxide an aero for the entire crop area of the United States. Tn other words, wo are wasting in this manner tho equivalent equiv-alent of 1,200,000 tons of phosphoric rock; and as far as can now be estimated, esti-mated, there remains to be mined only 58,000.000 tons of hlghgrade phosphoric phosphor-ic rock in the throe Southern states producing it. Fortuuatoly there are still large undeveloped resources In the Fnr West. The phosphorus of sewage can bo saved either by using sewage direct or by extracting from it the fertility It contains. Many may say this is Impossible. The answer Is that it has been done for ages The means used by China, Japan and India In-dia to have the source of fertility which we send out to the sea may be crude, but they are effective. The gyyin in- mTi i H'd- J- ? H -J I flMl1 I TTT f "" conservation of this clement has been partly solved In France and Italv. At countries become densely peopled necessity ne-cessity will compel them to corefully save and utlllzo every source of fortuity for-tuity at their command. China and Japan have done this, and therein lies the secret of their success in supporting sup-porting a dense population for many ages without impoverishing the soil New York Sun. |