ABSTRACT
Note.—The reader will observe that in the making of the calculations he will find in this chapter and elsewhere the output for 1935 is given sometimes at 222 million tons and sometimes at 215, and the number of wage earners sometimes at 754,000 and sometimes at 720,000. The explanation is that the Annual Statistical Summary issued by the Mines Department, which gives the figures for output and wages, deals only with 96 or 97 per cent of the output, while the Annual Report of the Department gives the totals of output and number employed for all coal mines. It should also be noted that in addition to the “wage earners” there is an average of 15,000 “clerks and salaried persons” carried on the pay roll of the industry.
