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I. MCLAUGHLIN, R. P.-Protecting California Oil Fields from Damage by Infiltrating Water. Discussed by M. E. Lombardi, A. F. L. Bell, A. C. McLaughlin, R. P. McLaughlin, William A. Williams, Mark L. Requa, C. D. Keen 2413 BEST, W. N.-Petroleum as Fuel Under Boilers and in Furnaces. Discussed by William A. Williams, Hennen Jennings, David T. Day, Mark L. Requa, A. F. L. Bell, W. N. Best 2420 JOHNSON, ROSWELL H.-Sliding Royalties for Oil and Gas Wells. Discussed by William A. Williams, A. C. McLaughlin, A. F. L. Bell, Roswell H. Johnson 2423 BELL, ARTHUR F. L.-Important Topping Plants of California. Discussed by William A. Williams, David T. Day, A. F. L. Bell 2426 LOMBARDI, M. E.-The Cost of Maintaining Production in California Oil Fields. Discussed by C. D. Keen, Mark L. Requa, H. M. Bacon, M. E. Lombardi 2427 HUNTLEY, L. G.-Oil, Gas, and Water Contents of Dakota Sand in Canada and United States, Discussed by E. W. Shaw 2428

Jan 12, 1915

By Albert E. Wiggin

PagE I. Early History of Boston & Montana Mill at Great Falls (1891 to 1905). 210 a. Original Mill Built in 1891.........210 b. Coarser Concentration Tried...211 c. Screen Sizing of Fine Jig Feed Introduced..211 d. Installation of Finer Grinding.......211 e. Steam Stamp Tried in Place of Blake Crushers..... 211 j. Mill Increased from Three to Six Sections........ 213 g. Tonnage Increased from 300 to 450 Tons per Section... 212 h. Round Tables Replaced by Wilfley Tables....212 I1. Hancock Jig Replaces Evans Jig...212 a. Description of Hancock Jig...213 - b. Tests Made on- Hancock Jig..213 1. Treating Natural Feed..215 2. Treating Sized Feed..215 3. Treating Classified Feed .215 c. Tests Made on Evans Jig...216 III. Richards Pulsator Classifier System...218 a. Experimental Work.....218 b. Installation of System in Section No. 4,....... 220 IV. Woodbury Classifier and Jig System.............222 V. The Great Falls System................ 222 a. As Installed at Anaconda............ 224 1. Coarse Crushing and Jigging Division...... 225 2. Hancock Jig Division........... 226 3. Fine Middling Division.......... 229 4. Table Division............. 230 5. Slime Division.........230 b. Special Features of Great ails Flow sheet....... 231 1. Development of Hancock Jig Flow Sheet..... 231 2. Development of Finishing Table Flow Sheet.... 232 3. Treatment of Coarse Middling Table Products .. 232 4. Results of Test Made on 500-Ton Section at Great Falls Mill...........234 VI. Comparison of Great Falls and Evans System at Anaconda.... 236

Jan 1, 1914

Jan 1, 1886

By H. M. Chance

Jan 1, 1887

PRESIDENT BENJAMIN B. THAYER,1 NEW YORK, N. Y, PAST PRESIDENTS JAMES F. KEMP,1 NEW YORK, N. Y. CHARLES F. BAND,': NEW YORK, N. Y. FIRST VICE-PRESIDENT SIDNEY J. JENNINGS,1 NEW YORK, N. Y. TREASURER GEORGE C. STONE,1 NEW YORK, N. Y. SECRETARY EMERITUS ROSSITER W. RAYMOND, NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 2, 1915

Jan 1, 1944

Jan 1, 1920

[Executive E. DEGOLYER, Chairman SYDNEY H. BALL WILLIAM H. Bassett RICHARD PETERS, JR. J. V. W. REYNDERS Finance GEORGE D. BARRON, Chairman H. A. GUESS GEORGE OTIS SMITH]

Jan 1, 1928

Jan 1, 1944

Jan 1, 1920

Jan 1, 1908

By Charles Cowie

Jan 1, 1985

By Joseph W. Siefke

Jan 1, 1985

By Paul M. Tyler

Higher freight rates and better methods of beneficiation now may make it more economical to open inferior deposits closer to a glass factory than to work higher-grade deposits farther away. Nature of impurities and special treatments as well as common practice of sulphuric acid leaching are described.

Jan 11, 1950

By James R. Piper

Jan 1, 1985

ALEXANDER, JOHN S, M,'74-6,'81-3 *ASHBURNER, C A, M, '85-7 ASMUS, GEORGE, Dl, '78-80 BACON, D H , M, '00-2 BAYLES, JAMES C , M,'80-2,'91-3 P, '84-5, V,'88-9 BIRKINBINE, JOHN, M, '83-5, V, 'S7-J, P, '91-2 BLAIR, THOMAS S , M, '74-43 BLAKE, WILLIAM P , V,'71-4,'76-7,'05-6 *BLANDY, JOHN F, V,'71-3,'78-9 BLOW, A A, C, '05-7 BOWIE, A J , JR, V,'93-4 *BRAMWELL, J H , A1, '89-91 BROOKS, THOS B , M, '72 BRUNTON, D W , V, 97-8 BUCK, STUART M , M, '83-5 *BURDEN, JAMES A, V,'80-1 BURNHAM, WILLIAM, M, '82-4. CAMPBELL, H H, M, '93-5 CHAMBERLAIN, H S , V, '96-7 CHANNING, J PARKE, V,'08 CHRISTY, S B , V. '91-2, '07-8 CHURCH, JOHN A, M, '79-8l,'94-6, V, '07-8 COGSWELL, W B, V, '74-5,'86-7

Jan 1, 1910

ALEXANDER, JOHN S, M,'74-6,'81-3 ASHBURNER, C A, M, '85-7 ASMUS, GEORGE, Dl, '78-80 BACON, D H , M, '00-2 BAYLES, JAMES C , M,'80-2,'91-3 P, '84-5, V,'88-9 BIRKINBINE, JOHN, M, '83-5, V, 'S7-J, P, '91-2 BLAIR, THOMAS S , M, '74-43 BLAKE, WILLIAM P , V,'71-4,'76-7,'05-6 BLANDY, JOHN F, V,'71-3,'78-9 BLOW, A A, C, '05-7 BOWIE, A J , JR, V,'93-4 BRAMWELL, J H , A1, '89-91 BROOKS, THOS B , M, '72 BRUNTON, D W , V, 97-8 BUCK, STUART M , M, '83-5 BURDEN, JAMES A, V,'80-1 BURNHAM, WILLIAM, M, '82-4. CAMPBELL, H H, M, '93-5 CHAMBERLAIN, H S , V, '96-7 CHANNING, J PARKE, V,'08 CHRISTY, S B , V. '91-2, '07-8 CHURCH, JOHN A, M, '79-8l,'94-6, V, '07-8 COGSWELL, W B, V, '74-5,'86-7

Jan 1, 1910

By Charles H. Morgan

Jan 1, 1905

Rooms With Bath Rooms Without Bath Name Location Double Single Double Single Astor Times Square, 43d St. and $5.00 up $4.00 up $4.00 $2.50 up Broadway Belmont 42d St. and Park Ave. 6.00 up 5.00 tip 5.00 3.00 up Breslin 29th St. and Broadway 5.00 up 2.50 up 4.00 up 2.00 up Hermitage 42c1 Street and Broadway 4.50 up 2.50 up 3.50 up 2.00 up Imperial 32d St. and Broadway 4.50 up 3.00 up 3.50 up . 2.50 McAlpin 34th St. and Broadway 4.00 up 3.00 up 3.50 up 2.50 up Manhattan 42d St. and, Madison Ave. 6.00 tip 4.00 up 4.50 up 3.00 up Martinique 32d St. and Broadway 4.00 up 3.00 up 3.00 up 2.00 up Monticello 35 West 64th St. 2.50 up 2.00 up Navarre 38th St. and Seventh Ave 3.00 up 1.50 up 2.50 tip 1.50 up Plaza 58th St. and Fifth Ave. 6.00 up 4.00 up, Prince George.... 28th St. anti Fifth Ave. 3.00 up 2.00 up York 36th St. and Seventh Ave. 3.50 2.50 up 2.50 1.50

Jan 1, 1919

By Stanley J. LeFond

Jan 1, 1985