ttOh 
ms ''-nn^r w iiroWwii« orv J vnpi-. -omipsuii s return trail. Cir-~ 
cumstances prevented me from obtaining more than a few 
crystals, which are now deposited in ithe 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 worn out animals, seeking 
to gain a spring of water in a distant range of mountains. 
This desert was then entirely unexplored. I have buh 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 districtf* 
of copper 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, 
diojites, trachytes, and lavas, nearly over the whole area. 
i ® 
BOTANICAL 
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