15. Meanings of 'colliery' and 'coal measures'.

15.     Meanings of 'colliery' and 'coal measures'.

'Colliery' includes or may include all contiguous and connected veins1 and seams of coal which are worked as one concern, together with the workings and machinery necessary for working the minerals2 and the business of selling the coal worked3. 'Coal measures' has been held to include those identifiable seams of coal which are or might be worth mining4.