Were all the sewage of this country treated along these lines British agriculture would derive distinct benefit, while industry would also be presented with a new source of supply of essential raw material. It would go a long way to enable us to use our greases over and over again, because the drain is the most popular avenue for the escape of this material. Sewage represents the greatest waste incidental to this country. Dr. Grossmann estimates its value at approximately £22,000,000--$110,000,000--per annum, of which but only an infinitesimal fraction is at present recovered. The value of the fat alone thrown down our drains, and reclaimed in a marketable form would realize from £500,000 to £1,000,000--$2,500,000 to $5,000,000--a year. The value of the manurial product, of which at least 1,000,000 tons are recoverable during the twelve months, may be set down at least at £2,000,000--$10,000,000--the contents thereof being equivalent to 50,000 tons of phosphates, 50,000 tons of potash salts, with nitrogen equal to that forthcoming from 100,000 tons of sulphate of ammonia. This manure would suffice for the fertilization of at least 3,000,000 acres of land from which we might safely anticipate gathering, at a modest estimate, additional crops worth £5,000,000--$25,000,000. There is one other fact which deserves mention. Sewage is eminently adapted to the feeding of sandy soils and other land which, at the moment, is considered too poor for agricultural purposes. If this manure were reserved for such land many thousand additional acres might be brought under cultivation in these islands. At the present moment these acres are being allowed to run to seed, constituting what we erroneously term waste land, but only waste because we are not sufficiently enterprising and energetic to reclaim it.