Before the Corporation of Oldham decided to install this system upon a practical scale searching experiments were conducted with the resultant manure, to determine its plant-feeding value. It was the promise of being able to find such a ready market for the ultimate residue which constituted one of the attractions of the process. Experiments were conducted at several farms with various produce, and these proved that the manure gives remarkably good results and is more effective than any other plant-feeder containing the same proportion of nitrogen, potash, and phosphates. Finally it contains an ingredient which is absolutely missing from every chemical fertilizer. The latter is certainly a plant food, but it is imperative that the ground should be treated with a certain quantity of organic matter to assure the physical and mechanical working of the soil. Decaying organic matter fulfils this end admirably, as one would suppose, being a natural process, but during the past five years the bestowal of sufficient quantities of necessary humus has been impossible, owing to the shortage in supplies of farmyard manure. For this reason every farmer regards a grease-free manure carrying substance of a humus-like nature for the improvement of his soil with a particularly friendly eye, and he is prepared to pay a good price for such an article. The sewage sludge fertilizer prepared under the Grossmann process offers the agriculturist just what he desires in this connection, inasmuch as it carries about 30 per cent. of the humus-like substance. Then, again, the active manurial ingredients are distributed over the mass in such a fine state of division as cannot possibly be attained by resort to mechanical grinding. Finally, it is excellently balanced, and the farmer keenly appreciates a well-balanced fertilizer. Here he gets it because the essential operation has been conducted by Nature, whose process cannot be rivalled. Applied to gardens this manure is found to prevent the growth of yellow leaves, while the green of the foliage is particularly rich and dark. In some quarters there has been a certain degree of hesitation to utilize the fertilizer merely because it is derived from sewage, owing to the prevalence of many fallacious notions. Its origin is regarded with revulsion, and its utilization with a certain degree of dread, but there need be no apprehensions whatever concerning its use. The fact that in the course of the treatment the material is raised to a temperature approaching 600 degrees Fahrenheit--where the superheated steam comes into contact with the waste to expel the fat--effectively disposes of all germ life inimical to the health of both animals and human beings, while it is also clean to handle and odourless, it being impossible, from mere cursory examination of the fertilizer, for the lay mind to determine its origin. Finally, it may be stored for any length of time without creating a nuisance, or deteriorating.