418 
The Extraction of Gold. 
[July, 
In short, summing up all the fafls and ‘ h * X 
dence bearing upon the question, we can o y (< f 
as? ,s d « r¥ ^ 
::rrS^ e ^l^nSd A^ia) d P oes not secure 
more than 45 per cent of the go • w hich has latter ly 
the auriferous fields of California obtained in nuggets of 
sanfs, gravels, and other drfnte 
""'Ki'oS « 3 F““ "> s ”“' 
but sometimes on y necessarily become poorer 
a popular notion, these reels ao not fr e aU ently richer. 
to the surface for further treatment- , in the per - 
This gold-stone, howeve c, differs not f fai h & ve 
r-ysyastst sr 3-* 
swtfsi,- . ^ayysssw 
anti S°o n f y the e m«cu n ry used, and a loss, as we have seen of 
The grelter p”rt ofUre gold demonstrably present in the 
St °The method of extrafling the gold from the stone may be 
„ , j -i 1 • f.,11 detail in every text -book 01 metai 
Inch a degree of fineness that it can pass through a sieve 
