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Collection: Books and Periodicals > Mining & Scientific Press

Volume 35 (1877) (426 pages)

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An Illustrated Journal of Mining, Popular jence and General News. BY DEWEY & CO., Patent Solicitors. SAN FRANCISCO, SATURDAY, AUGUST 25, 1877. VOLUME xAXXV. Number 8s. Items of Interest from the Mines. We give helow items of interest from prominent mines, most of whioh are collated from letters of the respective Superintendents on filo at the offices in this city: In tho Hussey Cou. mine the stopes from the 120-foot level are looking well. Ore is being hauled to the mil! to free ths dumps, so that the ore from the 230-foot level can be placed by itself. The Leopard mill isrunning nicely, and every rospect of continuing right along. The stopes See the 5th and 6th levels are in good shape, and will yield 25 tons per day easily. Above the 4th level they are all opened out. Operations at the Chollar mine for the week ending the 18th, show the following results: Numher tons extracted, 502 400-2000; Number tons forwarded to mills, 487 700-2000, Average assay of ore mined, $21.75 per ton. The ledge in the New England is about two feet wide, and will pay about $30 per ton. The Crown Point letter of the 20th, says: The south drift, 2000-foot level, has now reached a depth of 330 fect from starting point in main east drift. This leaves us 120 feet yet to run to connect with the joint pump shaft. The ground continues hard and dry, and the drift is making ood progress, having made 43 feet last week. he joint pump shaft now lacks ahout 40 feet on the Tae of our 2000-foot level. We have artially reopened the 160, 230 and 300-foot evels, The work thus far has been chiefly clearing and straightening up old drifts, winzes, ete. Atseveral points we have ’eneountered small streaks and spots of ore, but as yet the work has not been advanced sufliciently to determine its extent or quality. Some of the ore is very good, though most of it is of low grade and in mixed ground, requiring considerable assorting. The various drifts in the Eureka Con. mine are being carried forward at the usual rate, with very encouraging prospects throughout the respective levels. The 3d level drift has passed through the hard limestone formation mentioned in last report and has come into easier working ground with very good indications of ore in face of drift, The 5th level ore body is looking exeeedingly well and still shows no signs of diminishing. The 6th level ore body shows some improvement over last week and is looking very well. The ore body mentioned as having been struck on the 10th level shows decided improvement, and looks as though it would prove the best body of ore ever found in the mine. The main east drift has now been advanced 100 feet since eoming into this ore, with the face of drift continuing in ore. ‘Two cross-euts, each 25 feet long, have been run through this ore at different points, and are still in ore, The orc in drift and cross-cuts is quite rich, carrying a good percentage of lead, and making it first-class ore for smelting. ‘The furnaces have heen ruuning well during the week, yielding upwards of 25 tons daily, and aggregating over 353,000 pounds of bullion. In the Justice the 1150-foot level is freed from its watery element and operations resumed on the east drift, the face of which shows very fine stringers of quartz of a metal-bearing character; assays from $3 to $11 perton. The vein on the 1000-foet level from south lateral drift shows a regular and well-detined body of ore containing considerable metal. The wages on the Eurcka Cou. suit amount to over $25,000. BuLuion SHirments.—Since our last issue shipments of hullion from prominent mines have been as follows: Grand Prize, 16th, $13,300; Endowment, 16th, $3,098.63—total to date, $8,378.80; Martin White, 13th, $12,022.63; Grand Prize, 16th, $13,286.60; 20th, $13,300; Leopard, 20th, $3,600; Standard, 16th, $25,454; Con, Virginia, 16th, $178,368— total to date, $276,762.27; California, 16th, $135,756.83—total to date, $403,723.99; Northern Belle, 14th, $5,246.41; 16th, $4,753; Tyho Con., 14th, $4,068—total to date. $7,099; Northern Belle, 19th, $9,941.35; California, 21st, $159, 829.85—total to date, $563,553.84; @on. Virginia, 21st, $185,807.67—total to date, $462,569.94. . New Method of Making Propellor Patterns. Wo give herewith an illustration of a new method of making patterns for propellors, so as to get a turu serew by mechanical means, without the necessity of calculation and drafts. The new method was designed by Mr. Otto Osten, a mechauic of this city. As shown iu the engraving, a number of pieces of wood are planed to the same size, and placed on a piece of iron threaded on its upper end, so that a nut may clamp them together. They are then spread out to the required pitch and marked on both ends with a pair of compasses. All the wood outside the marks is then taken off. The pieces are smoothed up, clamped and glued together, and the pattern is made, After being clamped the pattern is narrowed at the hub and rounded at the tips to make it neater. This gives all the curves trne with no guess work, a3 is too often the case with the method in vogue. It ought to reduce the cost of propellors, as the pattern is so simply made. Propellor patterns are the most difficult jobs to do around a foundry; a true screw is difficult to make, and then they are not always sure of being correct. ‘Several propellors have becn made as samples from this style of pattern. and can be examined at the shop of E. H. Thompson, 228 Main street. After the pattern is made, before it is glued together, the ‘purchascr may examine and see if the pitch suits him; or he can set the pieces of wood before the pattern is made and get exactly the pitch he wants. Where it is desired to have the propellor curve inwards at the tip te prevent slip, the pieces pf wood are made a little thicker at the tips so that the screw can be made accurately. We have seen several of the patterns made on this principle, hy Mr. Osteu, all of which were very correctly made. Any ordinary mechanic ean make onc aa it takes no scientific knowledge to prepare plans and drawiugs before the pattern makers take hold of the work. Tue Eureka Seutinel saya: Senator Sharon invested $30,000 of his surplus capital in Eureka Consolidated shares last week, paying therefor $36 per share. It was a private transaction, and illustrates the mining magnate’s confidence in the future of the mine. Tue last bar of gold, valued at $9,000, has been shipped from the Eureka mine, to San Francisco. That completes the clean-ups, That mine has done nobly in yielding precious metal, and hundreds will regret to learn that work has been suspended on it forever. Coprrr.—The latest Liverpool quotations for copper are: Good ordinary brands, £68 15s. to
£69; special hrands, up to £70 per ton; ore, 13s. 6d. to 18s, 9d.; and regulus, 13s. per unit, The market has remained about stationary for the past month. Academy of Sciences. The regular meeting of the California ‘Acaddemy of Sciences was held on Monday evening last, Prof. Davidson in the chair. The following donations to the cabinet were received: From Prof. Davidson, magnesite from Fort Point, San Francisco; from Dr. H. D. Cogswell, specimens of cement from the walls of the tower of Ramleh, 12 miles from Jaffa, on the road to Jcrusalem; algo, specimens from the walls of Jerusalem; from the Acropolis, or citadel, of Athens, 150 feet ahove the plain; also porphyry from the mosque of Omar, at Jerusalem, From C. D. Gibbes, six specimens of pyrites crystala, auriferous, from Calavaras county, Cal. By exchange, six specimens of crystals of calcite, found in Geodes, north of Church Buttes, Wyo. ming; and lead ore, from Bingham canyon, Utah. From W. J. Downing, bones pieked up at Purissima; and specimens of madrono, with a curious growth enclosing a horse shoe hung on . it ten years ago, presented as a curiosity. Dr. , Kellogg read a paper on the following plants: . Evigeron ericoides, T. and G., from Mr. John PLAN OF MAKING PROPELLOR CASTINGS. Muir, Utah, ‘white-flowered species; also, &. cotula vephalum, and EH. stenephalum, variety argentium Kellegg, from the same; new plant from Cerros island, encelia humilis, from the late Dr. J. Veatch; crepes integrifolia, from Dr. Harkness, summit of C. P. R. R. The donation of two fishes was reccived from Mr. John E. Curry, collected in the Colorado river, near Yuma, at the junction with the Gila river; presented through Col. Geo. E. Gray. The following named gentlemen were elected resident memhers of the Academy: A. Meade Edwards, M. D., Geo. W. Dent, aud E. W. Bowen. Professor Davidson alluded to a letter received from Mr, Neber, of Humboldt hay, descrihing an invention for placing mirrors on buoys at the entrance to harhors, so as to reflect the light carried ata ship’s masthead. The idea was hrietly illustrated by means of a diagram. Theinventor seemed to think that his mirror would reflect all the light from the ship. This was shown to be erroneous, as the mirror would present only a point of light. This invention was not deemed of sufficient importance to merit the investigation of the Academy. Professor Davidson read a paper on a method of determining the mean distance of the sun by the parallax of Mars, The favorahle position of the Earth and.Mars, to occur on the 5th of September, would be utilized hy astronomers to determine the celestial unit of distance, Tue Imperial Government of China has issued an edict against the use of opium, declaring its use was hringing destruction upon the Chinese people. In addition to home production, opium is imported into China to an anuual value of over $40,000,000, principally from British India, Saws—A Fine Exhibit. Just to the right as you enter tho pavilion is one of the most extensive, expensive and instructive displays in the whole building, We refer to the polished article that revolves upon the partition and revolutionized the lumber trade of the world,saws, Tastily arranged and of every kind known to modern use, except the diamond teothed saw used for cutting stone, there is no more valuable or beautiful display in the whole building than that of the Pacitic Saw Manufacturing Company, composed of Messrs. Spaulding, Patterson and Sheffield. The manufacture of saws is one of the most ancient of all mechanical industries, they being in use ameng the old Egyptians and Greeks. By the latter, the inveutor was deified with the title of Talus or Perdix. With us, the manufacturer of the best saw is dignified and hlessed hy all mill-meh, and in this list come Messrs, Spaulding & Co. He heing the inventer and patentee of the movvable teeth, so much in use in circular saws, has greatly improved the supcerioiity of circular saws of the old style used. The value of their exhibit may be calculated by the knowledgo that the largest circular is worth near $500, and the smallest saw in the collection about 50 cents. The longest sash, or “‘muley” saw in use in the State is by the Noyo mill, in Mendocino, which was madc on a special order for the sawing of the large slab exhibitcd some years ago inthe fair, The saw is 16 feet long, and with it was sawn a redwood board 12 feet long and 7 feet wide. The artof forging and tempering mill saws is one that can be acquired only by the best and most intelligent werkmen, and the low price of lumber, and the strong competition in the trade, have forced our mill-men to employ the best and most improved machinery in the trade. This has hrought Messrs. Spaulding & Co’s. goods extensively into use, as, heing right at home, any little defect in a saw can be quickly remedied when hrought to their notice, and any peculiarity required in them, or adjustment to any special machinery, can he made to order. They also make saw mandrels and arbors a speciality. They have attached helting to some 14 saws in their exhihit, so as to display them in motion, though not at the speed at which they would he driven when actually at work, and then playfully put up notices to the puhlic not to handle. Their factory is at Nos. 17 and 19 Fremont street, where they have a very extensive establishment, and many thousands of dollars of stock for inspection aud sale. Fine Castings. The AStua Iron Works, Pendergast & Smith, proprietors, make an exhibit in the line of iron castings, which, though a single piece, is of a shape prohahly the most ditheult our founders have to deal with. Itisa large propellor for the steamer Ajax, and weighs 10,600 pounds. It is fourteen feet in diameter, being the largest in size and weight ever cast on this coast. This ig the fifth one of this pattern built for the Ajax. In running up the coast the steamer mects a good miany large logs which get away from the numerous mills up there, and she has in each case broken her propellor by coming in contact with these logs. These iron works make a ‘specialty of propellor casting, having on hand patterns for fourteen different sizes. The large one referrred to is set up 80 as to be revolved slowly, and several other smaller sized propellors are within the railing on the floer. In the same exhihit are a number of patterns of ornamental iron work for house fronts. The Stna Iron Works also make a specialty of this class of work, orders for which have greatly increased of late years among us. The designs shown are very handsome and much more ornamental than can he made durable in wood. A great variety of these designs is kept on hand, and, of course, new ones are made to order. Al. together the display is quite creditable, and if the example of the Attna had heen followed hy more of our foundrymen the ae puhlic would haye been more favorably impressed with the extent of our iron nianufacturing resources,