June 27, 1913. THE COLLIERY GUARDIAN. 1405 removing their existing slag-grinding plant to another site. The slag plant, when completed, will have a grinding capacity of 1,500 tons per week of Bilston basic phosphate. The new plant is entirely driven by gas engines operated by blastfurnace gas. Another large gas engine and dynamo, to provide the additional power required in the works, are being erected in the new power house. The engine is of 1,000-horse power, and its installation will give the gas power plant at Messrs. Hickman’s w