192 B. Silliman, Jr., on the New Almaden Quicksilver Mines, 
strings, and in a majority of cases penetrate or subdivide the 
masses of cinnabar. Sometimes narrow threads of these mine- 
rals, accompanied by a minute coloration of cinnabar, serve as 
the only guide to the miner in re-discovering the metal when it 
has been lost in a former working. 
Veins or plates of white massive magnesian rock and sheets 
of yellow ochre also accompany the metal. Iron pyrites is rarely 
und, and no mispickel was detected in any portion of the 
e cinnabar occurs chiefly in two ssive and a 
subcrystalline. The first is fine granular, or pulverulent, soft, 
and easily reduce the condition of v ion; the other 
turous than Cornishmen, and willing oftentimes to undertake 
past fifteen years, that the mine for a time eared to 
completely exhausted of ore. Such a condition of things has, 
owever, always proved to be but temporary, may always 
parallel, for the most part, to the pitch of the hill, but at a some 
t of the famous law-suit, whic! 
held this company in a condition of doubt, the new parties, into 
