Barnard’s Report on the Machinery, etc. 175 
large scale. This will be practicable by having recourse to the 
facilities afforded by one or both of the two plains on either 
side of the Sta. Eulalia mountains. , j 
West of the mountains, superior facilities for the dressing of 
ores, and for patios, are to be had at Tabalopa on the Sacra- 
mento river, at the distance of some eight miles from the mouth 
of the Arroyo Dolores. Ores could be delivered at this point 
by wagon at near the same rate that they are now freighted on 
mules over the mountains to Santa Hulalia. This way out to 
the plain would be by the ravine, and thence the whole way to 
Tabalopa by a down grade. 
Having extended my observations but a little way east of 
this gorge, I am not prepared to determine the question of an 
exit on that side of the Sta. Eulalia range. Should it be found 
practicable to cheaply deliver ores in the Conchos valley, this 
side would, on the whol present superior conditions for reduc- 
tion works, provided a good water supply can be had, which is 
robable, as the plain is already thoroughly irrigated. Fuel 
mesquite) is far more abundant here than on the Chihuahua 
side, and the position is nearer by two days to all supplies drawn 
xas. 
New York, Jan. 1, 1870. 
ART. XX1.— Machinery and Processes of the Industrial Arts, and 
Apparatus of ‘the Sciences; by Frepmrick A. P. 
Barnarp, LL.D., United States Commissioner to the Paris 
Universal Exposition. 
nd different and all ae were 
me forty | an 
entire civilization of the globe. Taken together they formed a 
representation of the art, the industry and ‘the inventions of 
mankind, and of every ideal yet realize apr aRE Ye the ele- 
eee operative power, d the progress of the TAT. EROR, 
_ tom the material to the structure 
or the machine; from the staple to the “mas 
