Mineralogy and Geology. 127 
As soon, therefore, as rnd nt are comparatively exhausted 
the miners will be n to the veins, a normal production of gold 
will begin, snd it may be said, in general, that hoa ounce of gold 
. wherever produced, will require a nea al expenditure of 
ower. all metals gold is the most uniform in its mode of oc- 
veins may be considered as canal oot Other riots are 
found in a variety of conditions; sometimes with one matrix and 
sometimes with another of a very different nature and hardness. 
They are e also i in combination with a pebied of elements from which 
future, especially if such mining is enc meee se suitable legisla- 
tion. Yet under the most favorable conditi ons the production of 
gold from veins cannot be expected to 1 ous and rapi 
has been from the placers. ith this mtieet fe decrease in the 
* This, of course, is stated in a very general way, and there may be exceptions. 
+ The distribution of gold may be said to be beagle ith the mountain 
_ Chains of the globe. There is no extended region, no great political division of 
— lobe without its gold fields. Itis a notable fact, also, that it occurs chiefly in 
where water-power can be readily obtained for its extraction. 
ies Bee reed ace ee a a pee hs de ea eee ia ly 
