Page:The character and extent of air pollution in Leeds - (A lecture delivered before the Leeds Philosophical Society, on March 3rd, 1896.) By Julius B. Cohen (IA b21534160).pdf/8

8 PART I.

WILL first refer to the subject of smoke. There is daily sent into the air of Leeds about 20 tons of soot, of which half-a-ton falls, and of that half-ton, 20 to 25 pounds sticks, i.e., is not removable by rain.

A Leeds Boiler Chimney.

I have estimated that, in Leeds, 4,000 tons of coal on the average are consumed every working day of the year. I don’t know what the ratio of house consumption is to factory consumption; but the amount of soot given off from factory chimneys is, at the lowest estimate, ½ to ¾ per cent. of the