10. Meaning of 'minerals'.

'Minerals' admits of a variety of meanings, and has no general definition1. Whether in a particular case a substance is a mineral or not is primarily a question of fact2. The test is what 'minerals' meant at the date of the instrument concerned3 in the vernacular of the mining world, the commercial world and among landowners4, and in case of conflict this meaning must prevail over the purely scientific meaning5. Nevertheless, 'minerals' is capable of limitation or expansion according to the intention with which it is used6, and this intention may be inferred from the document itself or from