W. F. Hillebrand—Liilingite and other Minerals. 357 
where R repesents Pb and the double atoms Ag, and Cu,. In 
each case the ratio is nearly 8:4: 15, which leads to the gen- 
and Colorado Smelting Works assures me that it is frequently 
much richer, running as high as 40 ozs. to the ton. 
Before conferring a name upon this mineral or even definitely 
claiming it is a new species, I purpose investigating more fully 
the’ similar ores which are said to occur in other mines in the 
neighborhood of the Missouri mine. As this further investi- 
ation will, of necessity, be. postponed for some time, the re- 
sults already arrived at are now put on record, 
HUBNERITE. 
Same axis in a cleavage section 
a8 observed by DesCloizeaux for wolframite. In the plates 
SO a ae won ce (0°62 
wo. ed sce Spe 
MOG lisse coger tai 23°40 
FOO oa 0-24 
OB ooo ven ae ee 0°13 
