California Mining Journal (PH 16-15)(August 1942) (36 pages)

California Mining Journal, August, 1942 SEVEN San Franciscans Hear About a Rich California Tin Mine 7>\NE of the featiires of the strategic mineral hearifig before the Board of Stipervisors of the City and County of San Francisco on July 6th, was the disclosing of the fact that Riverside County has one of the richest tin mines in the world, regardless of the fact that the U. 8. Bureau of Mines insists that there is no tin in Ameri¢a and of the California Division of Mines that tin does not exist in commercial quantities in the Golden State: _This assértiof was made by Supervisor Walter V. Pittman of Riverside, Cal., quoting an engineer who made an exhaustive study of the property. The engineer, E. N. Robinson, concluded his report with the statement: “In conclusion, I contend that the Temescal Tin District, can be made the most valuable mineral property in the United States and such has been my opinion since I first became acquainted with its development, over 20 years ago.” The Engineer’s Report Extracts from Mr. Robinson’s report on the Cajalco mine in the Temescal district, Riverside County, Calif. as presented to the San Francis¢o Boatd by Supervisor Pittman aré as follows: “t commeneed work on the Cajalco Lode for the present owners in 1888, but suspended all active operations on the beginning of litigation which continued until March of last yeat, when on appeal, the U. S. Supreme Court confitmed and settled for all time the validity of the title in the present owners. Development Work Exposes Rich Ore “The total work done aggregates over 1,186 feet of shafts, tunnels, drifts, winze and crosscuts; such work being of sufficient extent to determine the fact that this one lode is of great magnitude and of remarkable richness, that it will average at least 6 feet in width and hold its permanency in every part thereof. The ore is a brown oxide, of very high grade, free from mundic, wolfram, * arsenic, etc. which are objectionable combinations in most tin ores. This ore produces a fine quality of tin, and equal to the best “Cornish refined.” I have sampled every part of the lode, as developed, many times and have worked the ore therefrom in quantity on a practical scale with extraordinary results. I sent in 12 tons of ore (fair samples from the mine) to Joseph Mosheimer, metallurgist of San Francisco, and had some crushed, concentrated and reduced to pig tin which yielded about 20% of pure tin in 50 bars of about 100 Ibs. each. One and one-half tons to Taylor & Co., smelters of San Francisco, yielded over 30% of pure tin. One ton of ore taken from the dump was sent to London last September and an analysis thereof by Messrs. Johnson Mathey & Co. yielded over 16% metal (being equal to 24% of “black tin”). Further Tests Show Rich Content “Seventeen hundred pounds of the ore taken from different parts of this lode by Capt. Chas. Craze, M. E., of Redruch, Cornwall, in May, 1888, was shipped to Cornwall and reduced by W. J. Tryhall of Bissoe, which yielded over 17% of pig tin. “Professor Henry Mathey of San Francisco tested 18 large samples, weighing from 6 to 100 Ibs. each, taken from various parts of the mine, which averaged over 24% of black tin (the black tin returned 724% metal). “J have manufactured a quantity of tin plate, using the tin of this district to coat How Do You Like This For An Engineer’s Report? Just before the primary election in Oregon when, it is said, Gov. Sprague was badly in need of votes, the Portland Oregonian ran the following to appease those in Oregon who have been demanding that Oregon tin deposits be developed: TIN AND VANADIUM FOUND IN OREGON The State Department of Geology and Mineral Industries reports possible commerciai deposits of tin and vanadium in Oregon. Dr. H. C. Harrison, head of the state’s new spectrographic laboratory, said he found tin and “interesting quantities” of bismuth and silver in ore samples from “a certain corner of Oregon.” The vanadium came from a different section of the state, but Harrison did not disclose its location. His report said the metal might “easily be a commercial percentage.” Evidently this was not the right kind of bait as Mr. Sprague was among the also-rans. Many of our readers will remember that Dr. Harrison was the expert engaged by Sprague’s Oregon Mines Dept., to test the Burns tin ore. He had never before assayed tin but once in his life and confessed that when he threw pure tin into one of his melts he could not recover that. American iron and it proved equal to the best imported English plate. “T have been engaged in mining and smelting for over 30 years and have twice examined the most important tin mines of Cornwall (under advantageous circumstances) and have never met in any mine of any kind more indubitable evidence of a reliable and continuous lode than is shown in the workings of the Cajalco mine. 10,000 Tons of Ore Blocked “The present openings expose at least 10,000 tons of tin stone in place, ready for stoping. This and the other lodes have remarkable natural facilities for working on a very large and profitable scale. “In my extended experience I have never met with such a vast concentrated metalliferous deposit as exists in this district in conjunction with every requirement for economical working. “In conclusion I contend that the Temescal tin district can be made the most valuable mineral property in the United States and such has been my opinion since I first became acquainted with its development over 20 years ago.” Bases Argument on Solid Facts Mr. Robinson sums up his argument on SMALL COMPRESSORS For Developing Chrome, Manganese and Strategic Minerals CORDON SMITH and HEWITT COMPRESSORS HEWITT MACHINERY Co. facts that cannot be disputed when he further reveals that the ore is a brown oxide, the most valuable; that the veins average 6 feet; that the ore yields 20% pig tin; that the ore is easily reduced being free from objectionable elements, and that the mine and its workings are of easy access. The richest tin mines of Cornwall, he states, pay large profits on ore that returns practically less than 244% metal at a cost of production exceeding 45 pounds per ton of black tin. TIN SHORTAGE Almost a year after it was reopened, Carnegie-Illinois Steel corporation’s Shenango works at New Castle, Pa., shut down in early June as a result of shortages of tin and steel ingots for tin plate. A total of 2,100 were employed. C. L. Loyd of Berkeley, who has been developing a gold property in Sierra County, Cal., has suspended operations and accepted a position as an electrician at the now building Marysville, Cal., cantonment. AEE STS SS a MINING TANKS @ CYANIDE PLANTS @ WATER TANKS COOLING TOWERS 2) PACIFIC WOOD TANK CORPORATION 461 Market Street SAN FRANCISCO RECONDITIONED AND NEW PIPE VALVES FITTINGS “pacific” Reconditioned Pipe. Suitable for Air and Water Manufacturers of SPIRALOK VENT PIPE Send for Booklet 304 Main St. SAN FRANCISCO Represented by Ww. M. FLOOD Phone 187-3 Auburn, Calif. 1028 Folsom St. SAN FRANCISCO.

California Mining Journal, August, 1942 SEVEN San Franciscans Hear About a Rich California Tin Mine 7>\NE of the featiires of the strategic mineral hearifig before the Board of Stipervisors of the City and County of San Francisco on July 6th, was the disclosing of the fact that Riverside County has one of the richest tin mines in the world, regardless of the fact that the U. 8. Bureau of Mines insists that there is no tin in Ameri¢a and of the California Division of Mines that tin does not exist in commercial quantities in the Golden State: _This assértiof was made by Supervisor Walter V. Pittman of Riverside, Cal., quoting an engineer who made an exhaustive study of the property. The engineer, E. N. Robinson, concluded his report with the statement: “In conclusion, I contend that the Temescal Tin District, can be made the most valuable mineral property in the United States and such has been my opinion since I first became acquainted with its development, over 20 years ago.” The Engineer’s Report Extracts from Mr. Robinson’s report on the Cajalco mine in the Temescal district, Riverside County, Calif. as presented to the San Francis¢o Boatd by Supervisor Pittman aré as follows: “t commeneed work on the Cajalco Lode for the present owners in 1888, but suspended all active operations on the beginning of litigation which continued until March of last yeat, when on appeal, the U. S. Supreme Court confitmed and settled for all time the validity of the title in the present owners. Development Work Exposes Rich Ore “The total work done aggregates over 1,186 feet of shafts, tunnels, drifts, winze and crosscuts; such work being of sufficient extent to determine the fact that this one lode is of great magnitude and of remarkable richness, that it will average at least 6 feet in width and hold its permanency in every part thereof. The ore is a brown oxide, of very high grade, free from mundic, wolfram, * arsenic, etc. which are objectionable combinations in most tin ores. This ore produces a fine quality of tin, and equal to the best “Cornish refined.” I have sampled every part of the lode, as developed, many times and have worked the ore therefrom in quantity on a practical scale with extraordinary results. I sent in 12 tons of ore (fair samples from the mine) to Joseph Mosheimer, metallurgist of San Francisco, and had some crushed, concentrated and reduced to pig tin which yielded about 20% of pure tin in 50 bars of about 100 Ibs. each. One and one-half tons to Taylor & Co., smelters of San Francisco, yielded over 30% of pure tin. One ton of ore taken from the dump was sent to London last September and an analysis thereof by Messrs. Johnson Mathey & Co. yielded over 16% metal (being equal to 24% of “black tin”). Further Tests Show Rich Content “Seventeen hundred pounds of the ore taken from different parts of this lode by Capt. Chas. Craze, M. E., of Redruch, Cornwall, in May, 1888, was shipped to Cornwall and reduced by W. J. Tryhall of Bissoe, which yielded over 17% of pig tin. “Professor Henry Mathey of San Francisco tested 18 large samples, weighing from 6 to 100 Ibs. each, taken from various parts of the mine, which averaged over 24% of black tin (the black tin returned 724% metal). “J have manufactured a quantity of tin plate, using the tin of this district to coat How Do You Like This For An Engineer’s Report? Just before the primary election in Oregon when, it is said, Gov. Sprague was badly in need of votes, the Portland Oregonian ran the following to appease those in Oregon who have been demanding that Oregon tin deposits be developed: TIN AND VANADIUM FOUND IN OREGON The State Department of Geology and Mineral Industries reports possible commerciai deposits of tin and vanadium in Oregon. Dr. H. C. Harrison, head of the state’s new spectrographic laboratory, said he found tin and “interesting quantities” of bismuth and silver in ore samples from “a certain corner of Oregon.”

The vanadium came from a different section of the state, but Harrison did not disclose its location. His report said the metal might “easily be a commercial percentage.” Evidently this was not the right kind of bait as Mr. Sprague was among the also-rans. Many of our readers will remember that Dr. Harrison was the expert engaged by Sprague’s Oregon Mines Dept., to test the Burns tin ore. He had never before assayed tin but once in his life and confessed that when he threw pure tin into one of his melts he could not recover that. American iron and it proved equal to the best imported English plate. “T have been engaged in mining and smelting for over 30 years and have twice examined the most important tin mines of Cornwall (under advantageous circumstances) and have never met in any mine of any kind more indubitable evidence of a reliable and continuous lode than is shown in the workings of the Cajalco mine. 10,000 Tons of Ore Blocked “The present openings expose at least 10,000 tons of tin stone in place, ready for stoping. This and the other lodes have remarkable natural facilities for working on a very large and profitable scale. “In my extended experience I have never met with such a vast concentrated metalliferous deposit as exists in this district in conjunction with every requirement for economical working. “In conclusion I contend that the Temescal tin district can be made the most valuable mineral property in the United States and such has been my opinion since I first became acquainted with its development over 20 years ago.” Bases Argument on Solid Facts Mr. Robinson sums up his argument on SMALL COMPRESSORS For Developing Chrome, Manganese and Strategic Minerals CORDON SMITH and HEWITT COMPRESSORS HEWITT MACHINERY Co. facts that cannot be disputed when he further reveals that the ore is a brown oxide, the most valuable; that the veins average 6 feet; that the ore yields 20% pig tin; that the ore is easily reduced being free from objectionable elements, and that the mine and its workings are of easy access. The richest tin mines of Cornwall, he states, pay large profits on ore that returns practically less than 244% metal at a cost of production exceeding 45 pounds per ton of black tin. TIN SHORTAGE Almost a year after it was reopened, Carnegie-Illinois Steel corporation’s Shenango works at New Castle, Pa., shut down in early June as a result of shortages of tin and steel ingots for tin plate. A total of 2,100 were employed. C. L. Loyd of Berkeley, who has been developing a gold property in Sierra County, Cal., has suspended operations and accepted a position as an electrician at the now building Marysville, Cal., cantonment. AEE STS SS a MINING TANKS @ CYANIDE PLANTS @ WATER TANKS COOLING TOWERS 2) PACIFIC WOOD TANK CORPORATION 461 Market Street SAN FRANCISCO RECONDITIONED AND NEW PIPE VALVES FITTINGS “pacific” Reconditioned Pipe. Suitable for Air and Water Manufacturers of SPIRALOK VENT PIPE Send for Booklet 304 Main St. SAN FRANCISCO Represented by Ww. M. FLOOD Phone 187-3 Auburn, Calif. 1028 Folsom St. SAN FRANCISCO.