Dirty work!

392 Dirty work! The manufacture of dirt in homes and factories is an industry that keeps many people very, very busy. Because people burn "raw" coal in grates and furnaces, there's steady work all year round for housewives, window-clean- ers, painters, sweeps — a long and costly payroll indeed! Fog damage and delay are another expensive by- product — and yet we could actually be making money instead of dirt if we called in Mr. Therm! His system of coal carbonisation gives us a clean, convenient heat without smoke and dirt, without the work they 'I burn to make Britain rich ' says Mr.