It only remains here to refer to those applicable to leases to farm.
A much easier method, applicable to glass originals, is that of photographic reproduction by contact printing.
The law is defective and unfair in its incidence, and it is not applicable to foreigners.
This is the cheapest of the three caving systems, but is applicable only when the deposit lies between walls of very solid rock, as otherwise wall rock is liable to cave with and become mixed with ore, which adds greatly to the expense of handling.
The above account applies more particularly to Crania, but in the main it is applicable to the other Inarticulata which have been investigated.