TWO NEW FIRE-PREVENTIVE SUBSTANCES.
E. G. Acheson, of Niagara Falls, N. Y., has invented two substances which will prove useful for heat and fire-resisting purposes, He calls them siloxicon and Egyptianised clay. The former is a product of the electric furnace, and is made from ground coke and sand by methods resembling those employed to obtain carborundum. The temperature, however, is not so high as that which the latter calls for, being only 4,500 to 5,000 degrees Fahr., against 7,000 degrees Fahr, for carborundum. The color of siloxicon is a grey-green, and. in view of the high temperature at which it is made, it withstands the heat of flame of fuel combustion, and will prove well adapted to linings for furnaces or converters, for fire brick, etc. Up to the present time nothing has been found that will stand the intense heat developed in the use of oil for fuel ; it is expected that siloxicon will answer the purpose. Egypt ianised clay is made by treating ordinary clay by the Acheson process, by which the tensile strength is increased from fifty to 350 per cent. It is expected that the discovery of this new method of treating clay will make it more available for heat resisting purposes than before; in the past it has been found to have a tendency to crack.
The law committee of the Pennsylvania State Firemen’s association lias disapproved of the bill to make the burgess of a borough the head of the fire department of his district. The bill has already passed the senate and is now before the house.