The superheated steam charged with the grease is passed into a condenser, where water from a feed tank condenses the water and throws down the grease. The mixture of condensed steam and grease is passed into a recovery tank. The grease settling out on the top is removed for boiling up in a separate vessel, upon the completion of which treatment it is ready for packing and sale. The fatty matter consists largely of stearine and palmitine, which to-day meet with a prompt sale at lucrative prices. But it is the solid residue in the dry powdered form which attracts the greatest measure of attention. Disposal of the grease from sewage has never occasioned so much difficulty as the utilization of the ultimate residue from reasons already explained. In this particular instance the great problem has been solved. The manure is in the form of a fine powder, containing nitrogen, phosphoric acid, and potash, as well as about 40 per cent. of organic material. It is very fine, brownish in colour, odourless, and what is more to the point, absolutely innocuous, having been completely sterilized. Consequently there is no risk of infection being disseminated by its use. The circumstance that the process is absolutely automatic from the time the sludge is charged into the hopper to the finished article issuing from the distilling retort, is a distinct recommendation. Not only does it conduce to extremely economical operation, but it reduces the necessity to bring human labour into one of the most offensive of industries, inasmuch as the atmosphere of such an establishment is scarcely fragrant, as may well be imagined, although familiarity breeds strange contempts. The only labour essential is that required for heating up the drying machines and retorts. There is one overwhelming advantage incidental to this process which cannot fail to arouse attention. Pressing in any form is eliminated. This not only signifies a very pronounced saving in capital expenditure in the first instance, but contributes to lower working charges, while there is an enhanced recovery of grease and an absolutely grease-free residue.