. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 48 THE CIVIL ENGINEER AND ARCHITECT S JOURNAL. [Februaet, IMPROVEMENT IN MESr^RS. WHITELAW AND STIRRAT'S 'J/////i/l/l/llilll!,,. In the " Mechanics' Magazine " we have a suggestion for an im- provement in Messrs. Whitelaw and Stiriatt's Water Wheel, given in hist month's Journal, of which the accompanying drawing shows the plan, which, with the assistance of Mr. George Whitelaw, Mr. James White- law has invented for keeping the new pate
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 48 THE CIVIL ENGINEER AND ARCHITECT S JOURNAL. [Februaet, IMPROVEMENT IN MESr^RS. WHITELAW AND STIRRAT'S 'J/////i/l/l/llilll!,,. In the " Mechanics' Magazine " we have a suggestion for an im- provement in Messrs. Whitelaw and Stiriatt's Water Wheel, given in hist month's Journal, of which the accompanying drawing shows the plan, which, with the assistance of Mr. George Whitelaw, Mr. James White- law has invented for keeping the new patent water-mill out of tail- water, nn is the main-pipe, b b are the arms of the machine, and c is the top of its shaft. The arms work inside of an air-vessel //, wliich is fixed down to a building, and is covered on the top, but has no bottom. The shaft passes freely through a hollow cylinder fixed above an opening in the top of//; and there is anotlier hollow cylinder a, fixed also on the top of//, and so large in diameter inside as to leave room for a third cylindrical jjart e, which is fixed upon the up- right shaft to revolve easily in the space left between the other two cylinders. The top of//, forms a bottom to the space which is be- tween the two cylindrical parts first named, and e is fixed (upon the shaft in such a manner that the joining will be air-tight. An inspection of the drawing will make the arrangement, &c., of the cylindrical parts intelligible, g is one side of the tail-race; s is the opening through which the water escapes from//) into the tail-race. Suppose now the space into w hich the cylinder e works sufficiently •filled with water to form an hydraulic joint of the kind very commonly used in gas works; then, if the machine is set in motion, the air, which will in some instances be disengaged from the water, will re- main in the vessel//, and press down the surface of the water in it to the level n ji, or even lower. In this way, the arms of the ma
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