Note 8 — Chapter VII

In 1918 the average number of days worked by each miner in the bituminous fields was greater by twelve than that of 1917, and by twenty-five than that of 1916. During the half-year period from April to September, 1918, bituminous production was twelve per cent greater than in the corresponding period of the previous year, which had itself established a record, despite the decrease in the number of mine workers.