March 25, 1920-" Optical Glass and Its Future as an American Industry." BY ARTHUR L. DAY, PH.D., Director, Geophysical Laboratory, Carnegie Institution, Washington, D. C. The development of optical glass in the United States was begun tentatively before our entry into the great war, but had not proceeded to a point where any assurance of adequate quality or quantity or variety could be given before the imperative needs of our own service were upon us. The available surplus production of France and England was long since exhausted and what appeared even more discouraging, the technical details of manufacture and specifications were held secret in those countries. It therefore fell to the lot of American scientists to develop unaided, the entire technic of manufacturing glasses of the highest refinement, and to provide an adequate supply for all branches of the service within a period of a few months. The story of this development will be told with illustrations, together with some account of the outlook for a permanent industry of sufficient magnitude to make the United States independent in future both in its military and commercial needs. Joint Meeting with Philadelphia Section, American Chemical Society. BY CHARLES E. MENDENHALL, PH.D., Professor of Physics, University of Wisconsin, Madison, Wis. The lecture will deal with standard instruments for the determination of height, speed and engine performance; with certain special devices useful for bomb-dropping; and with the problem of airplane navigation and the instruments in use and under development for this purpose. April 8, 1920-" Electric Welding as Applied to Shipbuilding." BY COMFORT A. ADAMS, S.B., E.E., Dean, The Harvard Engineering School, Harvard University, Cambridge, Mass. Joint Meeting with the Philadelphia Section, American Institute of Electrical Engineers. April 15, 1920-"Potash and the Cement Industry." BY A. E. Wells, Assistant Chief Metallurgist, Bureau of Mines, Department of the Interior, Washington, D. C. Briefly, the lecture will cover the development of the process for the recovery of potash from cement dust, dating from initial experiments to the development carried on at Riverside, Calif., and extending through to the development of the types of recovery plants now in use (electrical precipitation installations) at eastern cement plants, and the wet method of recovery as employed at several of the western cement plants. A discussion will be given as to the character of the mill recovery, the costs of the recovery of the dust, and costs of preparing pure potash salts by the treatment of these dusts. Joint Meeting with Philadelphia Section, American Chemical Society. April 21, 1920-"The Design of War Vessels as Affected by the World War." BY REAR ADMIRAL DAVID WATSON TAYLOR, CHIEF CONSTRUCTOR, U.S.N., Chief of Bureau of Construction and Repair, Navy Department, Washington, D. C. During fifty-one months of the war there were many naval encounters, and the enormous value of sea power was fully exemplified. The lecture will discuss the experiences of types existing at the beginning of the war, with particular reference to the improvements and changes in such types made or shown to be desirable during the progress of the war. The question of new types of war vessels growing out of war experience will also be briefly discussed. April 29, 1920-Speaker and subject to be announced later. May 19, 1920-Presentation of The Franklin Medal. MEMBERSHIP DIRECTORY HONORARY MEMBERS. Brigadier General JAMES ALLEN, U.S.A. (Retired), Army and Navy Club, Washington, D. C. Col. GEORGE L. ANDERSON, U.S.A. (Retired), Army and Navy Club, Washington, D. C. Dr. JOHN A. BRASHEAR, 1954 Perrysville Avenue, Pittsburgh, Pennsylvania. Dr. JOHN J. CARTY, 195 Broadway, New York City, New York. Prof. CHARLES F. CHANDLER, Columbia University, New York City, New York. Sir JAMES DEWAR, The Royal Institution, London, England. Mr. THOMAS A. EDISON, Orange, New Jersey. Prof. GEORGE FORBES, No. 11 Little College Street, Westminster, S. W., London, England. Prof. HENDRIK ANTOON LORENTZ, Zylweg 76, Haarlem, Holland. Senator GUGLIELMO MARCONI, Royal Italian Senate, Rome, Italy. Dr. T. C. MENDENHALL, Ravenna, Ohio. Rear Admiral JOSEPH B. MURDOCK, U.S.N. (Retired), Danbury, New Hampshire. Prof. HEIKE KAMERLINGH ONNES, University of Leiden, Leiden, Holland. Mr. RALPH W. POPE, 570 Cherry Street, Elizabeth, New Jersey. Prof. THEODORE WILLIAM RICHARDS, Wolcott Gibbs Memorial Laboratory, Harvard University, Cambridge, Massachusetts. Major General GEORGE OWEN SQUIER, War Department, Washington, D. C. Rear Admiral DAVID WATSON TAYLOR, Navy Department, Washington, D. C. Prof. WM. CAWTHORNE UNWIN, Palace Gate Mansions, Kensington, London, England. Dr. H. W. WILEY, Room 1120, Woodward Building, Washington, D. C. Lieut. A. B. WYCKOFF, U. S. N. (Retired), 131 East H Street, Ontario, California. CORRESPONDING MEMBER. Mr. T. COMmerford MARTIN, 29 West 39th Street, New York City, New York. Mr. ISAAC B. THORN. IN MEMORIAM. MEMBERS. ABBOTT, LYLE STOCKTON, Civil Engineer, 300 Willow Avenue, River Edge, New Jersey. ABBOTT, ROBERT R., Metallurgical Engineer, The Peerless Motor Car Company, Cleveland, Ohio. ABEL, CHARLES, Painting and Paper Hanging, 300 Fifth Avenue, Haddon Heights, New Jersey. ACHESON, EDWARD G., Manufacturer, Acheson Corporation, Æolian Building, 35 West 42d Street, New York City, New York. ADAMS, HOWARD L., Managing Director, Keystone Institute, Reading, Pennsylvania. ADDICKS, WALTER R., Vice President, Consolidated Gas Company of New York, 130 East 15th Street, New York City, New York. ADSIT, CHARLES G., Engineer, Ponce de Leon Apartments, Atlanta, Georgia. AKELEY, CARL E., Taxidermist and Sculptor, American Museum of Natural History, 77th Street and Central Park West, New York City, New York. AKIMOFF, NICHOLAS W., Mechanical and Hydraulic Engineer, 1013 Harrison Building, Philadelphia, Pennsylvania. ALBRECHT, A. C., Vice President, North Brothers Manufacturing Company, Lehigh Avenue and American Street, Philadelphia, Pennsylvania. ALEXANDER, J. R., General Road Foreman of Engines, Pennsylvania Railroad Company, Altoona, Pennsylvania. ALLAN, ANDREW, JR., Manufacturer of Bearing Metals, Harrison, New Jersey. ALLEMAN, GELLERT, Professor of Chemistry, Swarthmore College, and for mail, 8 Whittier Place, Swarthmore, Pennsylvania. ALLEN, HENRY B., Metallurgical Engineer, 7711 St. Martins Lane, Chestnut Hill, Philadelphia, Pennsylvania. ALLEN, JAMES, Brigadier General, U.S.A. (Retired), Army and Navy Club, Washington, D.C. ALLEN, WILLIAM E., Clerk, 109 S. 43d Street, Philadelphia, Pennsylvania. ALLEN, WILLIAM N., Retired Chemical Manufacturer, 557 Church Lane, Germantown, Philadelphia, Pennsylvania. ALLIGER, WILLIAM T., Chemical Engineer, Harrison Safety Boiler Works, 17th Street and Allegheny Avenue, Philadelphia, Pennsylvania. ALSBERG, CARL L., Chief, Bureau of Chemistry, U. S. Department of Agriculture, Washington, D. C. AMRAM, PHILLIP WERNER, Student, 4000 Pine Street, Philadelphia, Pennsylvania. ANDERSON, ROBERT J., Metallurgical Engineer, U. S. Bureau of Mines, Experiment Station, ANDREWS, W. S., Consulting Electrical Engineer, General Electric Company, Schenectady, New York. ANGERER, VICTOR, Vice President, Taylor-Wharton Iron and Steel Company, and for mail, P. O. Box 162, Ridley Park, Pennsylvania. APPLEBAUM, ALAN I., Chemist, Import and By-Products Company, Trenton, New Jersey. ARMSTRONG, WILLIAM R., Clerk, Powers-Weightman-Rosengarten Company, Philadel phia, Pennsylvania. ARNY, H. V., Professor of Chemistry, 115 West 68th Street, New York City, New York. ASEF, WALDEMAR, Research Chemist, 112 South 54th Street, Philadelphia, Pennsylvania. ASHBROOK, DONALD S., Chemist. 2404 Willard Street, Wilmington, Delaware. ASHHURST, JOHN, Librarian, The Free Library of Philadelphia, 13th and Locust Streets. Philadelphia, Pennsylvania. ASHMEAD, FRANK M., Civil Engineer, 816 Ivy Street, Pittsburgh, Pennsylvania. ATHERHOLT, GORDON MEADE, Mechanical Engineer, Atlantic Refining Company, 3144 Passyunk Avenue, Philadelphia, Pennsylvania. ATLEE, JOSHUA W., Naval Architect, Wm. Cramp and Sons Ship and Engine Building Company, and for mail, Riverton, New Jersey. ATLEE, WALTER, Civil Engineer, 1741 Biltmore Street, N. W., Washington, D. C. ATTERBURY, W. W., Vice President, Pennsylvania Railroad Company, Broad Street Station, Philadelphia, Pennsylvania. ATWATER, RICHARD M., JR., Consulting Mining Engineer, Scarsdale, New York. AUCHY, GEORGE, Research Chemist, Henry Disston and Sons, Tacony, and for mail, 6933 Tulip Street, Tacony, Philadelphia, Pennsylvania. AUDENRIED, LEWIS, Eddystone, Pennsylvania. AUSTIN, W. L., Vice Chairman of the Board. The Baldwin Locomotive Works, 500 North Broad Street, Philadelphia, Pennsylvania. AYRES, EUGENE E., JR., Sharples Specialty Company, West Chester, Pennsylvania. BACON, RAYMOND FOSS, Chemist Director, Mellon Institute of Industrial Research. University of Pittsburgh, Pittsburgh, Pennsylvania. BAEKELAND, L. H., Research Chemist, Snug Rock, Harmony Park, Yonkers-on-Hudson. New York. BAKER, FRANKLIN, JR., Manufacturer, Wayne Avenue and Hortter Street, Germantow BAKER, GEOrge fales, Physician, 403 Lafayette Building, Philadelphia, Pennsylvania. BALLENTINE, WILLIAM I., Vice President, Advance Rumley Company, La Porte, Indians. Pennsylvania. BALLS, WILLIAM H., Ship's Draughtsman, 1422 Snyder Avenue, Philadelphia, Pennsylvania BANCROFT, JOHN, Manufacturer, Wilmington, Delaware. BANCROFT, JOSEPH, Vice President and Treasurer, Joseph Bancroft and Sons, Wilmington. Delaware. BANNISTER, J. C., Manager, National Tube Company, Kewanee, Illinois. BARKER, WHARTON, Economist and Financier, Port Royal Avenue, Roxborough, Philadelphia, Pennsylvania. BARNES, JAMES, Professor of Physics, Bryn Mawr College, Bryn Mawr, Pennsylvania. BARNES, JOHN HAMPTON, Attorney-at-Law, Morris Building, 1421 Chestnut Street, Philadelphia, Pennsylvania. BARNETT, EDWIN S., Wheat Starch Manufacturer, Mount Alverno, Delaware County, Pennsylvania. BARNHART, G. EDWARD, Mechanical Engineer, B. F. Goodrich Company, and for mail, 140 Bowery Street, Akron, Ohio. BARR, JOHN H., Mechanical Engineer, Remington Typewriter Company, 374 Broadway, New York City, New York. BARRETT, C. D., Mechanical Engineer, Locomotive Stoker Company, 50 Church Street, New York City, New York. BARRINGER, DANIEL MOREAU, Geologist and Mining Engineer, 1242 Real Estate Trust Building, Philadelphia, Pennsylvania. BARTH, CARL G., Consulting Engineer, Hotel Markeen, Buffalo, New York. BARTLESON, T. LEES, Chemist, E. I. du Pont de Nemours and Company, and for mail, 2530 West 18th Street, Wilmington, Delaware. BARTOW, EDWARD, Director, State Water Survey, 1007 West Oregon Street, Urbana, Illinois. BARWIS, CALVIN W., Civil Engineer, in care of Pennsylvania Railroad Company, Warren, Pennsylvania. BASFORD, G. M., President, Locomotive Feed Water Heater Company, 30 Church Street, New York City, New York. BASKERVILLE, CHARLES, Professor of Chemistry, College of the City of New York, New York City, New York. BASSETT, WILLIAM H., Technical Superintendent, American Brass Company, Waterbury, BATES, ONWARD, Civil Engineer, 332 South Michigan Avenue, Chicago, Illinois. BECKER, IRWIN A., Pharmacist, in care of Michael Reese Hospital, 2839 Ellis Avenue, BEEBER, DIMNER, Attorney-at-Law, 705 Land Title Building, Philadelphia, Pennsylvania. BELFIELD, T. BROOM, Manufacturer, 1905 Spring Garden Street, Philadelphia, Pennsylvania. BELL, J. SNOWDEN, Attorney-at-Law, P. O. Box 629, City Hall Station, New York City, New York. BEMENT, CLARENCE S., 3907 Spruce Street, Philadelphia, Pennsylvania. BEMENT, WILLIAM P. (Retired), 743 Real Estate Trust Building, Philadelphia, Penn sylvania. BENNETT, CHARLES E., Assistant to Mr. Charles G. Adset, Consulting Engineer, Georgia Railway and Power Company, and for mail, Kenilworth Apartments, Ponce de Leon Avenue, Atlanta, Georgia. BENNETT, FREDERICK M., Mechanical and Electrical Engineer, 112 W. Pomona Street, Philadelphia, Pennsylvania. BENT, STEDMAN, General Eastern Sales Agent, Phoenix Iron Works, 2006 Finance Building, Philadelphia, Pennsylvania. BENZON, GEORGE H., JR., Mechanical Engineer, 252 Mather Road, Jenkintown, Penn sylvania. BERG, ERNST J., Professor of Electrical Engineering, Union College, Schenectady, New York. BERG, HOLGER V., Chemical Engineer, Newport, Delaware. BERLINER, EMILE, Engineer, 1458 Columbia Road, Washington, D. C. BERLINER, HERBERT S., Engineer, in care of Berliner Gramophone Company, Montreal, Canada. BERRESFORD, A. W., General Manager, The Cutler-Hammer Manufacturing Company, Milwaukee, Wisconsin. BEST, W. N., President, W. N. Best, Inc., Engineers in Caloric, 11 Broadway, New York City, New York. BIDDLE, CHARLES M., JR., First Vice President, Supplee-Biddle Hardware Company, 517 Commerce Street, Philadelphia, Pennsylvania. BIDDLE, ELIZABETH C., 400 South Fifteenth Street, Philadelphia, Pennsylvania. BIDDLE, JAMES C., JR., Catholic Priest, Abbey of Gethsemani, Trappist P. O., Kentucky. BIDDLE, ROBERT, President, Biddle-Gaumer Company, 3846-56 Lancaster Avenue, Phila delphia, Pennsylvania. BIDDLE, W. LYMAN, Banker, 428 Chestnut Street, Philadelphia, Pennsylvania. |