82 
DK. J. SZABÓ 
the mines of the Comstoek lode or its vicinity. Having returned to Eeno 
and írom there passed on to Cheyenne, I leit the shorfcest route to the 
East, and turnéd south to Denver, where I arrived on the 14‘ th of aug. 
1882. M . Cross of the geological survey and Mr. Hillebrand the state 
chemist were so kind, as nőt only to show me the collections of the Colo¬ 
rado rocks and somé interesting minerals, bút alsó to aecompany me to 
the exposition. 
This enterprise was projected and has been carried forward by the 
Capital and energy of priváté mén; it has received no aid írom the State. 
The exposition will prohably be a permanent one. 
The building is a substantial structure of ahout the height of a two 
story house and consisting of brick glass and iron. It is in the form of a 
cross, its longer dimensions lying from nortli to south. The south wing 
contains the minerals and ores, somé of them of many hundred pounds of 
weight. Besides the minerals there were exhibited blocks of salt from dried 
salt lakes, in a manner calculated to show the thikness of the bed, and 
samples of coal chiefly from Colorado. 
The Nortli wing contained somé machines used in mining, bút this 
part was nőt yet c-ompleted at the time of my visít. 
In the shorter wings were placed the agricultural and indust.iial pro- 
ducts; while on the galleries somé objects of art were to be seen. There was 
no catalogue to be had, and so I was obliged merely to view the objects 
exhibited, and provided with labels or notices. In most cases the exliibitors 
themselves were so kind as to give us further particulars. 
The telluric ores attracted my attention more than all otkers. Being 
acquented with their mode of occurence in Transylvania, it was highly 
interesting fór me to see the rocks and associated minerals of the american 
ores, as far as they were represented at the exposition. The names given 
by Haidinger and imported by Dana, are used by the American miners 
much more systematically than by our workmen and mining engineers in 
Nagyág and Offenbánya, who employ their own trivial names (Schrifterz, 
Bláttererz, Bláttertellur, Weisstellur, Weiss-Sylvan, Gelberz, gelbe Sylvan, 
gelbe Beiche, graue Beiehe etc.) while the miner of Colorado uses the 
names of Nagyágite Svlvanite Petzite etc. 
I have nőt seen the american Nagyágite and Sylvanite either at the 
exposition or in the collections of the American Museums, in such well 
defined crystalline forms as the similar species of Offenbánya and Nagyág, 
and even the metallic Tellurium is fór the greatest part mixed with somé 
other telluric compound, so that it is less pure and less casily determinable 
than the Facebay specimens. 
The telluric minerals occur in Colorado C-alifornia and I tah, bút the 
specimens exhibited were all from the Boulder-County, Colorado, where 
