Frank Coffee, Forty Years On The Pacific — Oil and Fuel Used at Sea (1920)
“ A ship of, say, eight or ten thousand tons, making fourteen knots an hour, could often in fair weather do fifteen knots, but that extra mile an hour would probably cost in coal or oil consumption, $150 or $200 more in the twenty-four hours. Oil makes very little smoke when intelligently "fired." If you want to make a chief-engineer of an oil-burner jump, point out the volume of black smoke coming out of the steamer's smokestacks. He will make for the fire-room and raise Cain. A big volume of smoke shows waste of oil and bad combustion. ”
