After many tedious attempts it is now possible to convey small coal from "the size of dust to nut coal by pneumatic means. The Figure shows one of the first successful installation for this purpose. Pneumatic Ash-Handling Plant at the Norfolk Navy Yard of the United States Government. has, as far as the writer is aware, been erected in a factory in Austria, where twenty 10-ton truck-loads of coal per twenty-four hours have to be conveyed in order to feed the boilers in the two boiler-houses situated on both sides of the railway line (see figure).