say $15 per ton, meaning always the short ton of 2,000 pounds. The ore is worth in England from £12 to £15 per miners' ton, of 2,352 pounds, equivalent to about $50, to $62 for 2,000 pounds. The regulus is worth from 12 to 14 cents per pound.

From these figures it is apparent that a mine of base metal exclusively for the silver in these antimony-ores is too insignificant to be regarded-in the Pacific States, may return quite handsome profits, and be more desirable property than mines of silver or gold not strictly first class.

Abstract statement of the assessment-rolls of the proceeds of mines of Humboldt County, Nevada, for the year 1870.

ELKO COUNTY.

Cope district.—I have not yet been able to visit this district personally, nor could my deputy do so. For this reason I cannot speak as intelligently of the situation of its mining industry as I should wish to, especially as, from correspondence, I must come to the conclusion that this district, as well as the neighboring one of Bull Run, promises to become quite important 'in the near future.

It appears that during the year the development of the mines in Cope has satisfactorily progressed. The Argenta and Excelsior mines have been worked with great vigor during the summer, in order to prepare them for the extraction of large quantities of ore in the fall. By that time it was expected to have the mines sufficiently opened to give employment to forty or fifty miners in extracting ore. The Independent, El Dorado, and Monitor, have also been energetically worked.

There was only one dry-crushing and roasting mill in Mountain City in the summer, and as the ores carry large quantities of base metal, and cannot, therefore, be worked to advantage by the wet-crushing mills, which were first foolishly erected, this one mill (P. F. Davis's, formerly Vance's) was continually overcrowded with work. Finally, Mr. Norton resolved to add roasting-furnaces to his 10-stamp mill, but whether this programme has since been carried out I do not know.

In Bull Run district several mines have been worked throughout the year, and the ore has been brought to Mountain City for reduction. About one hundred miners are reported to have been engaged here in mining in the summer.

Lone Mountain district is situated twenty-eight miles north of Elko. Its name is derived from the position of the mountain, rising alone from the plain, but which properly belongs to the chain on which Mineral Hill, Railroad, Cope, and Bull Run are located, further south. Although this district is a very promising one, there is no work being done this winter. Several mines will, however, be opened in the spring. There are three formations of rock running through the mountain, namely, limestone on the east, and granite and slate on the west. The mines now located are mostly in the limestone, though the most important are situated between the granite and slate. The most promising is the Paulina. It contains 800 feet, and is situated between the granite and slate; its course is north and south; dip 50°. A shaft is sunk near the center of the claim, 50 feet. The vein is 4 feet wide, very regular, and the ores are steadily improving in descending. The average yield of the ore in the bottom of the shaft is $120 in silver per ton, and 25 per cent. lead. This claim is also opened on its northern extremity; it is traced for a mile. Several locations to the north promise well, and one to the south, owned by parties in San Francisco, has a shaft sunk on it 50 feet deep, showing the same characteristics of the ore as Paulina. The Paulina was located by Messrs. Lowe, McKenzie & Smith, who sold one-half of the mine to Messrs. E. V. Robbins and J. W. Hussey. The same parties own also the Monitor, located in the limestone. A shaft has been sunk 40 feet, and some stoping is done on this lode. Its width varies from 6 inches to 4 feet. The ore taken out is sold for $20 per ton, on the dump. It was hauled to Elko, and there smelted. The road from Elko is very good, affording plenty of water and grass nearly the whole year round. At the foot of Lone Mountain there is a stream of water that, in its lowest stage, furnishes 100 inches. If ores needing concentration, or milling-ores, should be found hereafter, this water would be extremely valuable. On the southern end of