The ashes and cinders which fall through the open mesh of the first riddles are caught by a second and stationary screen. The mesh of this sieve being finer only allows the dust to escape to fall into a mixing machine. Here it is combined with a regulated quantity of excrementitious matter drawn from an overhead tank. The materials are thoroughly blended, and the mixture ultimately falls direct into railway wagons. In this way all intermediate handling is obviated. This material constitutes a first-class fertilizing agent, is keenly sought by farmers, and accordingly meets with a ready sale. The cinders, arrested by the secondary stationary screen, are collected in a similar manner. They are not sold, but dumped into the bunkers of the works to fire the boilers, thereby assisting materially in the generation of the power necessary to drive the plant. The bulkier material remaining in the revolving conical grid is discharged on to a conveyor. While being moved forward all material of value, such as waste-paper, tins, scrap-metal, waste-food, rags, bones, glass and so on are picked off by hand to be thrown into bins. The manual labour employed to carry out this task of segregation may be considered to be an adverse cost factor. But against this expenditure for separation by hand must be set that formerly entailed in the destruction or other disposal of this material. Accordingly, all things considered, it may be accepted that the revenue derived from this source virtually represents money saved. In addition to the recovery of paper from the above-mentioned refuse the Cleansing Department also maintains a special service for the collection of such waste from offices, warehouses, and private residences throughout the city area. This procedure has been in operation for many years, but, owing to the scarcity of paper encountered during the war, and the need which consequently arose to display accentuated enterprise in this direction, an auxiliary collecting service was inaugurated. It was conducted by the members of the Women’s Volunteer Reserve, who received a percentage of the profits arising from the sale of the waste-paper thus gathered. So far as the waste-metal--light scrap, tins, and other odds and ends of a metallic nature--is concerned this was formerly sold in the form of detinned compressed billets. Under the present contract this is delivered to the contractor in the condition in which it is received. But it is quite possible that, at some future date, there may be a reversion to the baling process which formerly obtained. In view of this fact it has been deemed advisable to bale a certain proportion of the recovered metal merely in order to maintain the hydraulic compressing plant in good working conditions. The practice is to separate and to classify metallic material under one or other of six headings--bright tins, galvanized metal, light iron (black), cast iron, enamelled ware, and burned tins respectively.