The meaning of the expression "mining operations" in ordinary parlance has been considered by this Court in two cases under Commonwealth taxing Acts, Australian Slate Quarries Ltd. v. Federal Commissioner of Taxation [4] and Deputy Federal Commissioner of Taxation (Q.) v. Stronach [5] . Isaacs and Rich JJ. in the former case [6] thought that the expression as "universally understood in Australia" in a context which does not treat "mining" and "quarrying" as antithetical embraced all operations whether by hand or by machinery, and whether confined to excavating the surface as in alluvial claims or extended to excavations below the surface, by which any valuable deposit, other than ordinary soil, is extracted from the earth. This wide view has not accorded with the understanding of other judges of this Court, and I am bound to say, with respect, that it does not accord with mine. It is clear enough that "mining" is not nowadays confined in its meaning to the winning of minerals by means of underground working, for although that is its primary meaning an extended sense has long been given to it in connection with some substances. The extraction of coal by open-cut working, for example, is commonly referred to as open-cut coal-mining. On the other hand it seems safe to say that the getting of some other substances, such as freestone and granite, in blocks for building purposes, would never be spoken of as mining. In Stronach's Case [1] the Court declined to hold that such blocks were derived from operations in mining. The distinction which is commonly observed is, I think, that which Dixon J. indicated in the latter case [2] . While "mining" is nowadays given an extended meaning in relation to the winning of substances which have come to be thought of as generally obtained by underground working, so as to include the extraction of such substances even by means of surface excavations, yet such an extended meaning is not ordinarily given to the word in relation to other substances. For them the word "quarrying" is usually employed, though this again is by way of extension since the primary significance of the noun "quarry" is a pit for the cutting of blocks of stone such as those in question in Stronach's Case [1] . It would, I think, be unusual to apply the word "mine" to open diggings for the obtaining of stone of a kind which does not call up, by association, the idea of mining in the sense of sinking a shaft and tunnelling in pursuit of a desired substance. The point was brought out by Lord Herschell in Lord Provost and Magistrates of Glasgow v. Farie [3] (though he was dissenting on the construction of the Act there in question), when he said: "The word "mines" is, I think, in a secondary sense, very frequently applied to a place where minerals commonly worked underground are being wrought, though in the particular case the working is from the surface. For example, where iron is got by surface workings they are spoken of as iron mines, and so, too, with coal which crops out at the surface. No one, I think, ever heard of a coal or iron quarry" [4] . This passage is reflected in Halsbury's Laws of England, 2nd ed., vol. 22, par. 1155, p. 527.