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cumstances prer^ cW V.- '^orc iuau » iew 
crystals, which are now deposited in the collection of the 
Smithsonian Institute; a few others are also in the hands of 
members of the party. We were travelling at the time by 
forced night marches with nearly w T orn but animals, seeking 
to gain a spring of water in a distant range of mountains. 
This desert was then entirely unexplored. I have but little 
doubt that more interesting materials are to be found at the 
same point. 
The mountains of the former Territory of Utah promise a 
rich yield to the mineralogist. We know already of gold and 
silver ores in the east, west and south part of that district; 
oUcopper and lead ores in the south, and I have discovered 
the latter also in the centre of it; of specular iron ores and 
native sulphur in the Rocky Mountains and near Little Salt 
Lake ; of rock salt in the mountains south-east of Utah Lake; 
of native alum near Salt Lake; of various other salts in the 
deserts; and of silicates, composing the granites, porphyries, 
diorites, trachytes, and lavas, nearly over the whole area. 
m 
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Botanical 
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