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quired more unproductive labor in the ensuing season to open the mine properly for continuous working.

At this date, the mine is brought up (in the opinion of those in charge) to a proper stage of “advanced opening," and was never in better condition than at present. It is also the general opinion of examiners, that the vein never looked more promising than at present.

Masses are seen in sight at Stope No. 2, 4th level; Stope No. 5, 4th level; Stope No. 2, 3d level; Numbers 3, 6 and 7, 3d level.

The undersigned examined particularly the lode as it appeared in the bottom of 5th level, and can testify that it was extremely rich in barrel and stamp copper. This portion of the mine must wait for the steam power to enable its further progress.

In view of the above facts, the undersigned will be disappointed if the mine does not exhibit this season a material increase over the product of any former year. It is not unreasonable to hope for a yield of say 200 tons (including the prodnct of the stamp, estimated at 50 tons), in the year 1856–57. From the best information at hand the expense of carrying on the mine will be defrayed by the sale of 180 tons, at present market price.

The local management of the mine is under the control of A. C. Davis, Esq., Superintendent; and the undersigned takes pleasure in bearing testimony to the order maintained in, and economical administration of the affairs of the company by Mr. Davis, so far as his observation extends. He was the discoverer of the location, and has been its pioneer up to the present date, hav. ing devoted his time and energies for tlie last ten years in its development, and has met aud surmounted difficulties and dangers in that period, which it is difficult for those at a distance, and of a "settled country" to realize.

The Superintendent mentioned approvingly of the services rendered to the company by Mr. O. Sherwin, as Clerk, G. HARDY, Mining Captain, A. C. Frazier, Machinist & Engineer,

The conclusions the undersigned would draw from the above facts relative to the mine, are, that the Norwich is among the most promising of non-divided paying mines; and that instead of feeling depressed by the past, the stockholders should feel encouraged for the future: and that the mine should be sustained and worked during the present year, with all the force and energy which a wise administration of available resources will permit.

NATIONAL MINE.

At the National they have been steadily opening the lower parts of the mine. The lower adit, No. 3, has been communicated throughout, laid with tram-way, and is now the principal thoroughfare for the underground business of the mine. The advantages which this affords them is very great. The great trouble and expense of hoisting to the surface is avoided, as the stuff after being thrown down is taken out through the adit on cars drawn by animals. Shaft No. 2, which is the most western, is sunk to a fourth level, and they have driven eastward some distance toward No. 1, which is also about down to the same level. They intend to drive that level at four points from the two shafts immediately, until the connection between the two shafts is made, when they will continue driving east and west. Adits No. 2 and 3 will also be continually extended east. So that it will be seen that they are pushing on their opening with great rapidity by going east and deepening the mine. They have already opened new ground enough to give room for about 30 additional miners, who will soon be at work taking down the vein. As soon as their fourth level is connected between the shafts, a further increase of force can be made. These will, of course, add very greatly to the copper product of the mine.

The new openings thus far fully sustain the character of the lode for bearing copper. They have stoped a little in the back of No. 3 adit, west of No.1 stope and have found the ground very productive. The courses of copper seem to dip to the west about 20 feet in each lift.

There is room on the buff for a fourth adit, about 145 feet, or two lifts, below the present No. 3. It would go in at the surface about 650 feet to the west of the mouth of No. 3.—The valuable facilities afforded by this system of working the inine, as illustrated by their present openings, will probably induce the company to undertake the driving of this before long. The National will soon have a great amount of ground ready for stoping, and her product for another year will shown a great increase upon her past production.

MINNESOTA.

The Minnesota has at present more copper in sight than we have ever seen in any previous visit to that mine. The amount of pure native mineral now exhibited there is truly astonishing. Without stopping to consider points of ground which in other mines would be considered rich, we will at present very briefly call attention to the position of some of those immense things which require the labor of large parties of men for months to exploit.

In the counter-lode running between the south and conglomerate veins, which we noticed more in detail some months ago, they are still tearing off great masses about the adit level. This singular formation, in some of the levels might almost be said to be a continuous sheet of copper extending from lode to lode, and is likely to afford almost enough copper in itself to make a good mine.

In the back of the 20 fathom level, near the No. 7 shaft, and in the back of the 10 level, between shafts 5 and 8 (on the conglomerate load ), there are great masses of undetermined limits. At the latter point is what the Cornishmen call “a great boil of a thing”—a huge, shapeless, snaggy mass, resembling in appearance the copper in the Clitt' mine. It is stripped for a great extent. One sand blast of 20 kegs of powder was fired under it without starting it in the least from its position.

Several large masses have been disclosed in the 20 fathom level, about sixty feet east of No. 4 shaft. This ground came near escaping the attention of the miners. They drove by it on a good foot wall which at first was supposed to be the limit of the vein, but through which little horns of copper were observed projecting. The great number of these attracted attention, and they determined to break through the foot wall, when it appeared that they belonged to the conglomerate vein, and led at once to great masses of copper in that formation.

In the fifty fathom level, east of No. 4, which is below the junction of the two lodes, the openings have exposed very large masses going up and down.

One of the most favorable and auspicious indications at present to be observed in this mine is disclosed by the new openings at the extreme eastern part of the undeground works. For a considerable time their drifts in that direction went through dead and unproductive gound. But within the last few weeks they have again struck the copper-bearing belts, and are now opening ground which promises to be of the usual richness.

The openings of the mine have been kept well ahead of tle stoping parties. In truth they now have room for many more men to work than their present machinery will accommodate. They are about procuring a third hoisting engine, which, when in action, will add materially to the product of the mine.

The Minnesota raised during the month of June 303,123 lbs.of copper; and the Rockland, 40,395 lbs. during the same month.

The stockholders and friends of the latter, may safely look for an i crease of production for the present month.

ROCKLAND MINE.

The Rockland now have quite a mine opened, and henceforth will probably turn out a greatly increased amount of copper. They have very fine masses, some 270 feet east of No. 3, and east of No. 4 shafts, in adit level. No. 5 shaft which is the first one worked on the conglomerate lode, is already sunk con

15 39 9 50

siderably below the adit level, and No. 6, on the same lode, to the east, is sinking rapidly.

The history of the first operations of this mine is quite instructive. It has been brought to its present advanced state of progress with great energy, with a tax upon the stockholders comparatively trifling. But we shall reserve a detailed account of the mine until a future number.

The Adventure raised during the month of June 26,656 lbs.-13 tons 656 lbs. of which about two tons was stamp work—with 13 underground men, and five at the stamps.

At the Ohio mine, works have been resumed on the tribute system, under the direction of M. Milton Mason, of the Adventure and Aztec mines.

Notice of the other mines mentioned above will be given in another namber.

OFFICE OF THE ISLE ROYALE MINE, HOUGHTON, July 7th, 1856. Editor L. S. Miner, Dear Sir :-From recent remarks through the columns of your paper, I infer that you would like to have an occasional statement from the various mines throughout the Upper Peninsula in regard to work done, expenses, production, prospect, &c. Believing that the publication of reliable statements and statistics of the kind will have a beneficial effect upon the business of Mining and the methods of conducting it, I send you an abstract of the cost of the various kinds of work done and the production of mineral at our mine for the past six months, which if you see fit to publish are at your service. There has been, Stoped 292 cubic fathoms, at an average cost per fathom of

$22 63 Drove, 4614 feet, at an average cost per foot of Shafts sunk, 747 feet, at an average cost per foot of Winze sunk, 624 feet at an average cost per foot of The last two items include all charges for windlassing.

We have raised 119 tons, 293 lbs. of copper, or an average of 19 tons, 17154 lbs. per month.

The average amount of copper per fathom is 845 lbs. 3-282.
Average number of men employed has been 159.
Average expenditure of all kinds, monthly, $6,190 23.

Yours respectfully,

W. E. DICKINSON. At the Windsor we learn the stamp mill is in operation and working finely.

Norwich Mine,—The product for the month of June at this mine was 10 tons 500 lbs.—This, when we take into consideration the fact that they have no means at present of reducing their stamp work to copper (which averages from four to five tons per month of stamp copper). shows a handsome increase in the production of mineral. We are informed by the agent that the new stamp house is progressing rapidly, and that it will be ready for service within the next sixty days; when completed it will materially increase the production of the mine.

Cliff Mine.We are indebted to the L. S. Journal for the following figures in regard to the workings and product of this mine for the months of April and May. There was raised in April of

157,471 lbs. Stamp work

63,070 Barrel copper

$1,117 Total

301,658 "No. of men employed-miners, 280 ; surface men and officers, 229; total, 459

Stoped North on West Vein, 225 8-36 fathoms, and paid $22.50 per fathom.

Drifted 130 9–12 ft., and paid for the same $9.85 per ft.

Mass copper

Mass copper

49,740

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The amount of copper raised and prepared for shipment in the month of May, is as follows:

169,078 lbs. Barrel copper Stamp work

63.948

282,761 No. of men employod-miners, 225; surface men ́and officers, 203; total, 428.

Stoped 168 10–36 fathoms, and paid $22.81 per fathom. Drifted 52 feet, and paid for the same $9.66 per foot.

Total

THE NEBRASKA MINE.

Returning from a visit to the mines on the Minnesota Bluff, we stopped at the Nebraska, and devoted several hours to the examination of matters in that locality. We cannot but think that the present indications there are of & character quite interesting. The bluff upon which the mine is situated is cut off from the parallel ranges of the Minnesota location by the Flint Steel Gap—a broad valley, which sinks several hundred feet below the points of the spurs which confront it on either side, and carries the river of that name in its lowest depression. On the western side of this valley the bills of the Minnesota range lie with great regularity and symmetry, indicating that disturbances have not been frequent since their original upheaval. Their summits and sides are notched, in only one or two places, in such a manner as to indicate to the miner where he may expect to find a fault or heaving of the vein in the ground beneath. These superficial indications of regularity have been fully sustained in all the underground works of the great iniddle bluff, upon which the principal mines are located, wherever openings have been made.

From occasional cursory observations of the range lying to the east of this river, we have hitherto held the opinion that the country there was of a character widely different, being much disturbed and shaken up, and without regularity, though still bearing abundant surface evidence of copper. The gap through which the above-named stream flows, we have generally regarded as the boundary line between the region of regular veins, like those of the National, Minnesota, Rockland, &c., and that of the promiscuous metalliferous beds, such as characterize the Adventure and Aztec locations. We are not now prepared to say that this view of the character of the region in question is not just; but the late visit to the Nebraska disclosed to us some new facts which had escaped previous attention, or have been established by the recent workings on that location.

No very considerable amount of mine work has been done, but openings have been made on three several veins, two of which have certainly quite a promising appearance. The drift adit in the end of the bluff is much the larg; est opening yet made. In pushing this on, it is probable that the vein had been lost for a considerable distance, the workmen having been led aside to the north by a cross vein or feeder, and by copper indications in the country. Hence the rich ground which was struck several weeks since, and which has already turned out considerable copper, was met with as soon as they got back upon the vein in its regular course, by curving the drift southwardly. At the end of this drift is a large amount of rich ground, which for the past month has been quite productive. The vein has spread to an extraordinary width, and the opening made by taking out the copper rock has assumed the form of a large gallery. The copper still in sight in this drift will probably fully justify them in extending the openings at this point.

But there are new matters to which our attention was more particularly directed in the examination of this location. It has long been known that the bluff, near the crest, was much marked by ancient works, and upon the line formed by one series of these a shaft has been sunk some 60 feet, a little under the top of the hill, near the eastern end of the location. This open

ing disclosed very good ground, and yielded considerable copper. But operations here, as in all other parts of the location, were not puslied on during the winter, for want of supplies. And, in truth, it may be said that a vigorous prosecution of the development of this mine has not been an object of its direction and management. The vein upon which this shaft is sunk lies probably some two hundred feet south of that on which the drift is made. There are seven very distinctly marked ancient pits which appear to be on it, three or four of which have been pretty well cleaned out. They were cleaning a very remarkable one of these, a few hundred feet from the shaft above nemed, when we visited the location. It is 30 feet or more in length, and from 8 to 12 in depth, and forms at the eastern end a cave, the rock of the surface being left overhanging. The vein for this length is completely exposed, and its character is very good. It shows copper throughout, and in some places there is very good barrel work. No large mass is uncovered, but there are several small projecting horns of copper, which have been hammered by the ancient workmen. If this pit had been discovered upon a new location, it would probably attract great attention, not only on account of the copper now in sight, but from the general indications to be noticed. In the other pits along the bluff, which are apparently upon the same vein, small pieces of copper may be taken out with a pick, with very little trouble, and pounds have been obtained in this way, by a few minutes' labor. In almost all of them the vein is strongly charged with the green carbonate of copper. Small pieces of silver, too, have been found. In one digging, successive visitors, prompted by curiosity alone, had taken out pieces of copper until they had accumulated to fifty or sixty pounds.

In short, we believe the surface indications upon this vein are such as to justify serious attention and thorough exploration, and we are glad to notice that eight men are now engaged in clearing out and examining these pits.

The whole force at present is about 35 men. They need very little more surface improvement to enable them to accommodate such a force as will be sufficient to open and prove the mine. And we hope that a vigorous policy will be adopted in the prosecution of the work, as it is the only one which, in mining, can be truly economical.

The Windsor, we are informed by the Agent, is now looking very well, and promises a fair product for the future. The stamp mill was expected to be ready for operations the present week. We learn that the amount of stamp work already out of the mine is quite large, and, together with what they are constantly producing from the mine, will keep the stamps busy for some time to come.

The new vein of which we have previously spoken is improving very much as they descend in depth. They have commenced the sinking of two shafts on this vein, one of which is down 20 and the other 15 feet from the surface. The vein in the bottom of one of the shafts is full three feet wide, and carries considerable copper. One piece was taken out weighing 3 lbs. quite pure, and many others of smaller weight.

MERRYWEATHER MINING COMPANY.

NEW YORK, August 1st, 1856. As Mr. Merryweather only arrived at the mine on the first of June, all bis time was required to arrange the work for the summer. It was, therefore, impossible for him to have the yearly accounts ready to place before the Stockholders at the Annual Meeting, and whilst your Directors regret the delay, they are pleased in being able, now, to present you with the annexed report, showing the satisfactory progress of the work. The vein continues of the most regular character, producing in parts rich stamp work and lump copper; the rock is soft and excellent, is easily worked, and at much less expense than is usual in other mines. The work has progressed steadily, and seems now approaching a point, where several veins and feeders are gathering into one

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