FOUR-WHEELED TRUCK, WITH CENTRE-BEARING BOLSTER. Diameter of wheels 24 to 26 inches. WHEEL-BASE. Total wheel-base 19 ft. 1 inch. TENDER. ON TWO FOUR-WHEELED TRUCKS. Capacity of tank 1200 gallons. WEIGHT OF ENGINE IN WORKING ORDER. On drivers 28,000 pounds. On truck 16,000 " ------ Total weight of engine, about 44,000 " LOAD. IN ADDITION TO ENGINE AND TENDER. On a level 665 gross tons. " 20 ft. grade 305 " " " 40 " 190 " " " 60 " 135 " " " 80 " 100 " " " 100 " 75 " " [Illustration: Locomotive.] DIVISION I. ROAD LOCOMOTIVES FOR PASSENGER OR FREIGHT SERVICE. CLASS 20-1/2 C General Design Illustrated by Prints on Pages 52 and 56. CYLINDERS. Diameter of cylinders 13 inches. Length of stroke 22 or 24 inches. DRIVING-WHEELS. Diameter of drivers 56 to 66 inches. TRUCK. FOUR-WHEELED CENTRE-BEARING TRUCK, WITH SWING BOLSTER. Diameter of wheels 24 to 30 inches. WHEEL-BASE. Total wheel-base 20 ft. 1-3/4 inches. Rigid " (distance between driving-wheel-centres) 6 ft. 6 inches. TENDER. ON TWO FOUR-WHEELED TRUCKS. Capacity of tank 1400 gallons. WEIGHT OF ENGINE IN WORKING ORDER. On drivers 30,000 pounds. On truck 20,000 " ------ Total weight of engine, about 50,000 " LOAD. IN ADDITION TO ENGINE AND TENDER. On a level 710 gross tons. " 20 ft. grade 325 " " " 40 " 200 " " " 60 " 140 " " " 80 " 105 " " " 100 " 80 " " DIVISION I. ROAD LOCOMOTIVES FOR PASSENGER OR FREIGHT SERVICE. CLASS 22-1/2 C. General Design Illustrated by Prints on Pages 52 and 56. CYLINDERS. Diameter of cylinders 14 inches. Length of stroke 22 or 24 inches. DRIVING-WHEELS.