THE INDUSTRIAL REVOLUTION OF 1946 — No. 11 The obvious still pays a dividend There are works even now where the obvious measures to increase fuel efficiency have yet to be taken. Read these case histories—and make sure that the obvious hasn't been overlooked in your own place. 40% less fuel used By repairing air leaks round boiler settings, returning condensate to the boiler feed, lagging all steam mains, valves, and flanges, and installing instruments, a works re- cently reduced its weekly coal consumption from 20 tons to 12 tons.