The steam freight wagon has received par ticular attention in England, and there are now a munber of English concerns turning out wagons of this type capable of carrying loads of from two to six tons. The following are descriptions of four of these wagons, which competed in the trials of heavy-tratfie motor vehicles, which were instituted by the Liver pool Self-Propelling Traffic Association in 1899. A vehicle huilt by the Thornyeroft Steam Car riage and Wagon Company was 10 feet long by 6% feet extreme width, with a steel frame and wooden wheels of the military type. The front wheels were 2 feet 9 inches in diameter, and the driving-wheels 3 feet 3 inches. with tires on all. The boiler was of the well-known Thornycroft curved water-tube type with 82 square feet heating surface, 2.4 square feet grate area, and a test pressure of 250 pounds per square inch. The engine was of the horizontal, compound, reversing type, with 4 and 7 inch cyl inders and 5-inch stroke, entirely inclosed in a dust-proof and oil-tight casing. The transmis sion was by pinions. A two-ton steam lorry, built by T. Coulthard & Co., was fitted with a vertical fire-tube boiler. The heating surface was 77 square feet, and the working pressure was 200 to 225 pounds per square inch, with It test-pressure of 450 pounds; liquid fuel was used with a Leyland burner. The engine was of the triple-expansion, vertical, uni-direc tion type, with 2%, and 6 inch cylinders and 5-inch stroke, and was to develop 14 B.
horse-power at 500 revolutions per minute. Power was transmitted to the driving wheels by means of spur gearing connecting the engine shaft and first-motion shaft, friction clutches heing employed to put the gears into action. A 4-ton steam lorry, built by Clarkson & Capel, had a boiler of the fire-engine type, with small inclined eross-tubes of steel; (hi square feet heating surface, supplemented by 14 square feet of copper feed-coil located in the up-take. The working pressure was 200 pounds and the test pressure 350 pounds to the square inch. Liquid fuel was used to generate steam supplied to• burner of the true Bunsen type. The engine was a vertical compound, reversing, with 2% and 0 inch cylinders and 4-ineh stroke, develop ing 14 B. ho•se-power at 600 revolutions. The engine shaft carried a two-speed gear, with the higher speed put into engagement by an expand ing clutch, and a Ronald chain used to transmit power to the second motion. The Bagleys, of London, submitted a steam lorry with a De Dion boiler, with 70 square feet heating surface and a working pressure of 200 pounds; it is centrally fired with coke. The engine was of the compound vertical, inverted, reversing type. with 4 and 7 inch cylinders and 5-inch stroke, developing 22 13. horse-power at 500 revo lutions. Power was transmitted by bevel and spur gearing. It should lie said that in all these vehicles the moving parts are inclosed in dust and oil-proof casings.