Of the 427 stoppages of work through industrial disputes in the coal mining industry which were reported to our Department as having begun in the period 1st January to 30th April, 1947, 24 arose out of demands for advances in wages and 153 on other wage questions; nine on questions as to working hours; 32 on questions respecting the employment of particular classes or persons; 198 on other questions of working arrangements; and II on miscellaneous questions.