Bulletin (Volume 75) (Paperback)

This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1917. Not illustrated. Excerpt: ... Course of Vein. The course of a vein is not determined by its direction at any single given point where the vein is a crooked one. A locator's extralateral rights must be determined by the course of the vein at its apex at the surface of the claim. The most practical rule is to regard the course of the vein as that which is indicated by the surface outcropping or surface exploration and workings. The lower levels of a mine frequently show a different direction of the vein from that which guided the miner in making his location and are at variance with conditions shown in openings nearest to the surface. (Alameda Mining Co. vs. Success Mining Co. (Idaho), 161 Pacific, 862, p. 866.) Expert and Positive Testimony. The positive testimony of miners who mined the ore and developed the mine and the engineers and others who made actual surveys of the mine involved in a controversy as to extralateral rights must be taken for more than the speculative theories of experts on the geology and formation of ore bodies and the mineralization of veins. Physical facts should be given greater weight than mere expert opinion and speculative theories. (Alameda Mining Co. vs. Success Mining Co. (Idaho), 161 Pacific, 862, p. 868.) INDUSTRIAL ACCIDENT COMMISSION OF THE STATE OF CALIFORNIA. 525 Market Street, San Francisco. Union League Building, Los Angeles. MINE SAFETY RULES. Effective January 1, 1916. Sections 51 to 72, inclusive, of the Workmen's Compensation, Insurance and Safety Act give the Industrial Accident Commission power to make and enforce safety orders, rules and regulations, to prescribe safety devices, to fix safety standards, and to order the reporting of accidents. The phrase "place of employment" is defined in such a way that mining operations are included within the...