The experiments conducted at the Barking Sewage Farm seem to
show that the sewage of London may yet yield a large revenue to the Metropolitan Board. It has been proved by actual results that for every 100 tons of sewage poured upon land sown with ryegrass an increase of one ton of grass, worth 18s., will be pro- duced. The liquid is therefore worth about 24-cl. a ton, and the Board, it is said, will be quite contented if they can clear one penny. We should think they would!—as that price, if obtained for all their sewage, would leave a profit of about 1,5001. a day. This amazing result will probably not be obtained, as the extent of land required to consume the whole would be some 36,000 acres, but it seems clear already that the sewage of London can be dis- posed of with safety to the community and at a great profit. Barking, we suspect, will soon be filled with market gardeners, and pretty well left to them, as the odour of the sewage, though only occasionally "strong," is at no time pleasant.
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