§ 76. Mr. T. WILLIAMS
asked the Secretary for Mines the average increase of output per man shift in Yorkshire coal mines between the years 1920 and 1930?
§ The SECRETARY for MINES (Mr. Shinwell)
The average output per man-shift worked by all workers employed in coal mines in Yorkshire in 1920 was 17.23 cwts., and in 1930, 23.72 cwts.