SECTION II.-PAPERS AND DISCUSSIONS Recrystallization of Cold-Worked Alpha Brass on Annealing. By C. H. Mathewson and Arthur Phillips. 51 A Development of Practical Substitutes for Platinum and its Alloys, with Special Reference to Alloys of Tungsten and Molybdenum. The Control of Petroleum and Natural Gas Wells. By Alfred G. Heggem. Economies in a Small Coal Mine. By Herbert A. Everest Discussion of the Paper of F. L. Bosqui. By H. A. White Discussion of the Paper of Walter O. Snelling. By A. C. McLaughlin, William A. Williams, W. N. Best, M. L. Requa, A. F. L. Bell, Walter 173 The Effect of Aeration and "Watering Out" on the Sulphur Content of 177 The oftener you have to buy a Conveyor Belt-the higher goes your cost per ton for moving material. It is logical for you to want belts which will give the longest possible service. Our engineers meet this logical demand with a belt especially designed to resist abrasion, moisture, stretching, shrinking, edge wear, spillage, etc. This belt is the famous Goodrich CONVEYOR BELT This belt is a combination of perfect flexibilty with strength, perfect edge construction, wonderful wearing rubber cover and exact balance of cover, friction and duck. It is made in the largest rubber factory in the world. The size and broadness of the Goodrich business alone indicates we must give exceptional goods and exceptional service to get where we are-and stay there. We have solved conveyor cost problems in great plants all over the earth. It will pay you to "Get in touch with Goodrich." Aug. 14, 1916. Bequest of Published Monthly by the American Institute of Mining Engineers at 212-218 York St., York, Pa., H. A. WISOTZKEY, Publication Manager, Editorial Office, 29 West 39th St., New York, N. Y., BRADLEY STOUGHTON, Editor. Cable address, "Aime," Western Union Telegraph Code. Subscription (including postage), $10 per annum; to members of the Institute, public libraries, educational institutions and technical societies, $5 per annum. Single copies (including postage), $1 each; to members of the Institute, public libraries, etc., 50 cents each. Entered as Second Class matter January 28, 1914, at the Post Office at York, Pennsylvania, under the Act of March 3, 1879. ADVANTAGES OF LIFE MEMBERSHIP The Institute calls the attention of members to the following advantages of obtaining life membership: 1. One payment avoids the trouble of future payments. 2. The interest on $150 is less than the annual dues. 3. Provision is thus made early in life for the less productive years. 4. In case of an increase of dues at any time in the future life members are exempt from increased payments. Excerpt from By-Laws. Article III. Section 3 Any Member or Associate not in arrears may become, by the payment of one hundred and fifty dollars at one time, a Life Member or Life Associate, and shall not be liable thereafter to pay annual dues. The money thus received shall be invested and only the income thereof used for current expenses of the Institute. No formality is required in taking out a Life Membership except to inclose check for $150 with a statement that it is intended as a Life Membership payment. In receipt for this an embossed certificate is issued. iii JOHN FRITZ MEDAL AWARDED TO DR. JAMES DOUGLAS An Appreciation of Dr. Douglas by DR. ALBERT R. LEDOUX The Bulletins of the American Institute of Mining Engineers and the program of the International Engineering Congress, held last September at San Francisco, called attention to an important feature in the proceedings of the Congress; viz., the public presentation to Dr. James Douglas of the John Fritz Medal, for notable achievements in mining, metallurgy, education and industrial welfare. Dr. Douglas' health, unfortunately, did not permit of his taking the journey to California. While he had been willing that the bestowal of the medal should be a public ceremony, his natural modesty made him shrink somewhat from what he considered something of an ordeal, and he begged those who were to take part in it to use restraint in anything which they might have to say as to his work and attainments. It was, therefore, with some considerable satisfaction on his side. that he learned that the medal would be given him without a public ceremony in New York, or elsewhere. On Dec. 5, 1915, the writer of this had the pleasure of handing him the medal, certificate, and official letters of transmittal, at his home at Spuyten Duyvil, where he was surrounded by his children and grandchildren, with one or two of his most intimate friends. He begged the writer to return his thanks to the Committee of Award, and again to express the feeling that nothing in his career merited so great an honor. On this point all of the members of the Institute will share the writer's feeling that Dr. Douglas is too modest. James Douglas was born at Quebec, Canada, in November, 1837. His father was a distinguished physician and surgeon, employing his skill in the field of philanthropy. He established the first retreat for the insane in the Dominion, to which he devoted himself up to the time. of his departure from Canada, when it was taken over by the Government. The son spent 2 years in study at the University of Edinburgh, which he entered in 1855. Returning to Canada, he graduated from Queens University, at Kingston, Ontario, with the degree of Bachelor of Arts, having also studied medicine, and later theology. After his graduation he traveled extensively with his father in Europe and in the Orient, visiting Egypt several times. They returned with important archælogical collections, which Dr. Douglas subsequently donated to the Metropolitan Museum of Art in this city. He then returned to Edinburgh, where he continued his course in medicine, surgery being perhaps his chief interest at that time. He was subsequently licensed to preach and his contemporaries bore testimony to his broad philanthropy and to the sympathy which dominated his every act. His taste was distinctly literary; he had carried off a prize at Edinburgh in English literature. While still looking toward the ministry or medicine, or a combination of both, as probably his life work, and still occupied with his pen in literary lines, circumstances caused a complete change in his plans. His father had invested heavily in gold and copper mining in Canada, |