Arizona republican., 1899-07-13
OPENING A MINE.

When the shaft of a mine is sunk on the vein or deposit in the early stages of the development, the error is of toe common occurrence to find that the ore on the sides of the shaft has been stopped out, because it was easy to ac- cess and conveniently mined at small cost This is generally the prospec- tors first error, as the desire for ore'is in excess of the means st hand of ac- Quiring it at greater depth, and on that account prospect shafts are sel dom suitable for the main working shaft of the mine. When a shaft cuts or passes through an ore chute on the vein when the mine has passed the prospect stage, the temptation is pre- sented to extI3ct the rich ore on the sides of the shaft. If there are no min ing regulations in the district or no mine inspector to enforce them, or to prohibit such manner of working, these errors are sure to happen. The shaft of a mina whether on or off the vein is the entrance to the workings and should be used for that purpose alone and not for the ofject of ssoping ore from it's sides, which operation renders it unsafe and more liable to falls of roof or wall rock, which are liable at any time to block the en- trance. If it is sunk on the vein, a suitable amount of ore, say ten to twenty-five feet, depending on the strength of the ground. should be left on each sLde of the shaft before any stoping of ore is permitted It is also wise provision to leave the first fifty or more feet in depth from the surface which forms the back of the vein as a support to the loose surface wall rocks and that constitutes tthe roof of the mine and protects the workings from summer heat and winter rain. The neglect of making this provision has made future working more expensive and ruired many mines, by admitting surface water and falls of rock into the mine. The amount of ore left in ths first fifty or more feet on the back of the vein and in the ore reserved in the ten to twenty feet on each side Of the shaft IS not lost. for if the mine in future becomes exhausted in depth, these ore reserves always remain in sight as an asset which $ available and can be extracted before the work ings are abandoned, and it is the wisest plan to leave such parts to the last operation Of he mine instead Of the first stages of development, as is too often the case.-Mining and Met d1luI EicdI JOuTudl-
 S. F. Seagers of Helvetia, was in yesterday on business connected with the mine. He reports everything as hourishing at the camp. A great deal of development is being done and the results so far have been very satis- factory AboU. 200 men are employed by the company so that the Helve:ia pay roll leads to the distribution of a large sum of money e1ch month. The bulk of the work now being done at the mine IS mainly with aview of as certaining the value of the property. At one point the earth has been tapped to depth of 300 feet through a good showing of ore. Three shafts are being sunk. One is already at depth of 110 feet, another is down 100 feet, while the third has only recently been commenced. Visitors to the camp remark upon the immense amount of work being done, and i& is evident that the company realizes that it has a big thing. There $ now quite settlement at the mines, there being business enough to sustain sew eial stores Two lines of s.-ages are run between Helvetia and Tucson. On the whole the prospects in the camp are promisi ng.-Tucson S,ar.
 During the past ten months Carl Nelson has been very successful tn the management of the ..Old Boot" where a 3O-ton smelter is run n the Silver Bell district This is the Zeck- endorf property. and is under lease to Carl Nelson. It has come to pass that the two 50-ton smelters bought at sheriff's sale a few months ago have been transferred to the sCnelter site a. the ''Old Boot" These smelters were designed for the Saginaw. and as th5y failed to pay freight and demurrage charges the railway company had to resort to imperative action and re- cover By the in1roduction of the two 50-ton smelters the furnace ca pacity will be increased to 130 tons daily Not alone this. 1t means that the force in the camp will number one hundred men shortly. Tucson is the supply depot for the Silver Bell dis frict, though coke comes in Va Red Rock station and bulkon is shipped out through tn. same point.-Tucson Citizen.
 Jesse Robinson is in. from his min ing camp to receive in company With others, the first payment on the Silver Coin mine This property IS located in Turkey creek district and was sold for 15,000.-Prescott Courier
 AS Tn WHO I< N GIAn