Incidentally there have been extensive sampling and analysing of soils, investigations into rainfall and the composition of drainage waters, inquiries into the amount of water transpired by plants, and experiments on the assimilation of free nitrogen.
The valuation of mines then involves the following steps: (1) The sampling of the deposit so far as developed, and assaying of the samples taken; (2) The measurement of the developed ore; (3) estimates of the probable amount of ore in the undeveloped part of the property; (4) estimates of probable profits, life of the mine, and determination of the value of the property.
The sampling of a large mine of this character may cost many hundreds of pounds.
Rickard, The Sampling and Estimation of Ore in a Mine (New York, 1904); Truscott, The Witwatersrand Goldfields - Banket and Mining Practice (London, 1898; G.
There are ore sampling works and brick-making establishments.