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Machine-Cutting

Volume 236: debated on Monday 10 March 1930

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asked the Secretary for Mines what proportion of coal was out by machinery in Yorkshire and Derbyshire, respectively, in 1913, 1925, 1927, 1928, and 1929?

The figures are as follow:

Proportion of Coal cut by Machinery.
Yorkshire.Derbyshire.
Per cent.Per cent.
191310.310.7
192515.619.4
192716.822.7
192817.528.4
1929 (provisional)17.931.4