The Works Of Messrs. Schneider And Co.

3,000 HORSE-POWER ENGINE AND BLOOMING MILL. 83 has two cylinders, 1.200 metres (3 ft. 11| in.) in diameter, the length of stroke being 1.500 metres (4 ft. 11 in.). The effective steam pressure varies from 4 to 5 kilogrammes per square centimetre (56.89 to 71.11 Ib. per square inch), and the maximum admission of steam is 75 per cent. TJntil recently the exhaust steam was allowed to escape; the engine, however, is now being fitted with a jet condenser. With an effective steam pressure of 4 kilogrammes per square centimetre (56.89 Ib. per square inch), an effort of 150 tons can be exerted on the circumference of the roils of the armour-plate mili, which is on the other side of the engine. can operate, simultaneously, the blooming, and the armour- plate, mills. They are, however, generally driven in- dependently, and as they are connectée! with the engine by means of hydraulic-worked elutehes, it is easy to discon- nect either one. On the drivers left-hand is a lever working the reversing gear four-way valve, and on his right is a lever to regulate the admission of steam. He also operates from the same platform the steam stop-valve, and the cylinder blow-off cocks. The whole of the working parts are fitted with automatic lubricating apparatus. Blooming Mili.—The blooming mili, Figs. 200 to 205, Plate XLI., and Fig. 206, consists of two roils 1.200 metres Fig. 206. Blooming Miil and 3,000 Horse-Power Engines. The highest working speed of the engine is 90 revolu- tions per minute. Power is transmitted to the roil shaft by means of toothed wheels with double helical teeth, the ratio being 1 to 2.82, giving a maximum speed of 32 revo- lutions for the roils. The slide valves are cylindrical, and are not balanced ; the link-motion for reversing the engine is worked very rapidly by means of a double-acting hydraulic ram, which acts on the reversing shaft. The hy- draulic pressure of 35 kilogrammes per square centimetre (497.811b.per sq.in.)is employedthroughout the department. The engine-driver stands on a raised platform placed at the rear of the steam cylinders. He can watch from there all the work being done, and an experienced driver (3 ft. 11J in.) in original diameter, and 2.600 metres (8 ft. 6| in.) long ; they are made with eight grooves for the manufacture of all the biooms necessary for the fmishing rolis, from the heaviest to the smallest sections, measuring 110 by 90 millimétrés (4T% in. by 3^- in.). The largest ingot measures .450 metre square (17f in.) at the base, and weighs 1,600 to 1,700 kilogrammes (33 cwt.) ; what may be taken as the standard size is .420 metre square (16| in.), and weighs from 1,250 to 1,350 kilo- grammes (26 cwt.). The ingot is guided sideways and vertically through all the grooves, both in front and at the rear of the mili, by a special-shaped cast-steel guard-frame, a spare frame of the same type can be seen near the pinion