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70 TAE MaRINE REVIEW be approached, the water valve chest containing all the valves also being covered by a single bonnet. In the steam valve movement there are | three moving parts, consisting of two | steel reversing valves operating in line with the steam pistons and one steam-driven balanced piston valve. No regulation of valve gear is possi- ble or necessary, the parts, once built, remaining as constructed until worn out. These pumps are designed to work with the highest steam 'pres- sute, and in the 'case of those ine stalled on the North Carolina and her sister ship Montana were subjected to 500 pounds per square inch at both steam and water ends. Each vessel is equipped with 27 Cameron pumps. SPENCE PORTABLE ELECTRIC CONVEYORS. In a recent communication Spence. Nig Co; ot. St.Paul. 'say that the past year was a very satisfactory one for them in the sales of their portable electric conveyors, and from the many recent inquiries they have had for conveyors, not only from the steam- ship and railroad companies, but from manufacturing companies, it is mani- fest that a general interest is being CAMERON VERTICAL FEED PUMP IN BOILER ROOM OF U. S. S. NORTH CAROLINA. taken in this time and_ labor-saving device. PUMPS INSTALLED ON ARM- ORED CRUISERS NORTH CAROLINA AND MONTANA. The pumps shown in the accom- panying illustrations are part of the entire equipment of Cameron pumps installed on the United States armored etuiser Moreh Carolina and built at the A. S. Cameron steam pump works, New' York. The vertical twin-beam air pump has steam cylinders of 14 inch; diameter, air cylinders of 35 inch diameter by 18-inch stroke. The high steam pressure valve-gear fitted to the pump consists in its entirety of three moving pieces to each cylin- Ger and is patt.of it, all parts of. the gear being inside, This air. pump embodies in its design and construc- tion all the better features which are the result of practical experience and of the best obtainable knowledge of engineering practice in the building of this class of machine. The vertical feed pump has many features which appeal to the marine engineer, not the least of which is its accessibility, a very important and vital requirement aboardship. By removing a single bonnet either re- versing valve or the piston valve can CAMERON VERTICAL TWIN-BEAM AIR TUME ON U.. S...8;) NORTH CAROLINA,