On a level 1300 gross tons. " 20 ft. grade 600 " " " 40 " 380 " " " 60 " 270 " " " 80 " 205 " " " 100 " 160 " " DIVISION II. TEN-WHEELED FREIGHT LOCOMOTIVES. CLASS 28-1/2 D. General Design Illustrated by Print on Page 68. CYLINDERS. Diameter of cylinders 18 inches. Length of stroke 22 or 24 inches. DRIVING-WHEELS. REAR AND FRONT PAIRS WITH FLANGED TIRES 5-1/2 INCHES WIDE. MAIN PAIR WITH PLAIN TIRES 6 INCHES WIDE. Diameter of drivers 48 to 54 inches. TRUCK. FOUR-WHEELED CENTRE-BEARING TRUCK, WITH SWING BOLSTER. Diameter of wheels 24 to 26 inches. WHEEL-BASE. Total wheel-base 23 ft. 2-3/4 inches. Rigid " (distance between centres of rear and front drivers) 12 ft. 8 inches. TENDER. ON TWO FOUR-WHEELED TRUCKS. Capacity of tank 2000 gallons. WEIGHT OF ENGINE IN WORKING ORDER. On drivers 58,000 pounds. On truck 19,000 " ------ Total weight of engine, about 77,000 " LOAD. IN ADDITION TO ENGINE AND TENDER. On a level 1400 gross tons. " 20 ft. grade 645 " " " 40 " 410 " " " 60 " 290 " " " 80 " 220 " " " 100 " 175 " " ADDENDA. HARD AND SOFT COAL BURNERS