PL Le. ee eT ee Pee eee Binnie: Ze 
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the South and Middle Yuba, California. 15 
gravel by the use of the same forces which she employed in dis- 
tributing i 
I have dwelt with the more fullness on this process, so famil- 
gravel, rising in vertical cliffs with red and blue stains, serving 
to 
ment at the changes, geological in their nature and extent, which 
the hand of man has wrought. 
move it, w we stay our hand! ‘The process is but 
just commenced. It has required already twelve years to re- 
OV ve seen, eight per cent of the mining ground, 
auriferous gravel. The water shed between the two bra 
of the Yuba River now under consideration, includes not only 
the tributary streams which rise in the Sierras, such as Cafion 
Creek, Pass Creek, and others, but a great number of small and 
lakes, from a few acres to several miles in area which nes- 
tle among the hills. Of these the largest is the Truckee Lake; 
