. Electrical news and engineering . d. The air pump is ot the single acting, vertical type,and is driven direct from the steam piston rod. Thecirculating pump is driven from one end of the air pumpshaft. The surface condenser is of the Wheeler type. The engine is designed to work with a pressure of i6olbs. of steam, at which pressure 4,500 can be de-veloped. The whole engine weighs 400 tons, andmakes a smooth, silent-working machine. ELECTRIC RAILWAY FRANCHISE IN JAMAICA. Onk of Ihe largL-st foreign enterprises ihal Canadians have yetundertaken is sliortly to l)e carried out in Jamaica, t
. Electrical news and engineering . d. The air pump is ot the single acting, vertical type,and is driven direct from the steam piston rod. Thecirculating pump is driven from one end of the air pumpshaft. The surface condenser is of the Wheeler type. The engine is designed to work with a pressure of i6olbs. of steam, at which pressure 4,500 can be de-veloped. The whole engine weighs 400 tons, andmakes a smooth, silent-working machine. ELECTRIC RAILWAY FRANCHISE IN JAMAICA. Onk of Ihe largL-st foreign enterprises ihal Canadians have yetundertaken is sliortly to l)e carried out in Jamaica, tlirouj^h the eflforts ofMr. W. B. Chapman, of Montreal. This gentleman has for sometime been negotiating for an electric tramway franchise, and has at lastsecured a charter from the government to build twenty-five miles on theisland, in the vicinity of Kingston, which, it is estimated, will cost half amillion dollars. Associated with him are Messrs. F. S. Pearson, ofthe MttroiiDlitan Street Railway, New York, and Mr. B. F. Pearson,. 4,500 Large Engine in Power Hoise of Montreal Street Railway Company. piston rods are given a permanent deflection equal to thatdue to weight of pistons. In this way the piston rods arepractically straight when supporting full weight of piston,h The dimensions of the cylinders are as follows, viz.:High pressure, 36 inches diameter ; low pressure, 64inches diameter and 60-inch stroke. Both cylinders aresteam jacketed throughout. The valve motion on each cylinder is so arranged andoperated that steam may be cut off at any point up toseven-eighths of the stroke. The governor controls thevalve motion on both cylinders. An auxiliary governoris provided of same design as the regulator, which is at-tached to a stop valve in such a manner that should anaccident occur to the regulator which would allow thespeed of engine to be increased 10 per cent., the auxil-iary governor would close the stop valve and therebystop the engine. The fly-wheel is 24 feet
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