TERMS AND PRIVILEGES OF MEMBERSHIP

The members of the Institute are divided into the following classes, viz.: Resident Members, Stockholders, Life Members, Permanent Members, Non-resident and Associate Members.

Any one interested in the purposes and objects of the Institute and expressing a willingness to further the same may become a member when proposed by a member in good standing and elected by the Board of Managers.

Terms.-Resident members pay Fifteen Dollars each year. The payment of Two Hundred Dollars in any one year secures Life Membership, with exemption from annual dues.

Stock.-Second-class stockholders pay an annual tax of Twelve Dollars per share, and the holder of one share is entitled by such payment to the privileges of membership.

Privileges. Each contributing member (including non-residents) and adult holder of second-class stock is entitled to participate in the meetings of the Institute, to use the Library and Reading Room, to vote at the Annual Election for officers, to receive tickets to the lectures for himself and friend, to attend the Section meetings and to receive one copy of the JOURNAL free of charge, except associate members, who may not take part in elections.

Permanent Members -The Board of Managers may grant to any one who shall in any one year contribute to the Institute the sum of One Thousand Dollars a permanent membership, transferable by will or otherwise.

Non-resident Members-Newly elected members residing permanently at a distance of twenty-five miles or more from Philadelphia may be enrolled as Non-resident Members, and are required to pay an entrance fee of Five Dollars, and Five Dollars annually. Non-resident Life Membership, $75.00.

Contributing members, if eligible, under the non-resident clause, on making request therefor, may be transferred to the non-resident class by vote of the Board of Managers, and are required to pay Five Dollars annually.

Associate Members.-Associate members are accorded all the privileges of the Institute, except the right to vote or hold office, upon the payment of annual dues of Five Dollars. This class of membership is limited to persons between the ages of seventeen and twenty-five years. Upon reaching the age limit they become eligible to the other classes of membership.

Resignations must be made in writing, and dues must be paid to the date of resignation.

MEMBERSHIP DIRECTORY

HONORARY MEMBERS

Brigadier General JAMES ALLEN, U. S. A. (Retired), Army and Navy Club, Washing. ton, D. C.

Colonel GEORGE L. ANDERSON, U. S. A. (Retired).

Prof. SVANTE AUGUST ARRHENIUS, Nobel Institute, Stockholm, Sweden.

Brigadier General JOHN J. CARTY, American Telephone and Telegraph Company, 195 Broadway, New York City, New York.

Prof. CHARLES F. CHANDLER, Columbia University, New York City, New York. Mr. THOMAS A. EDISON, Orange, New Jersey.

Prof. CHARLES FABRY, Professor of Physics, University of. Paris, 1 Rue VictorCousin, Paris (5e), France.

General G. FERRIE, Inspecteur des Services de la Telegraphie Militaire et des transmissions, 51 bis, Boulevard Latour-Maubourg, Paris, France.

Prof. GEORGE FORBES, No. 11 Little College Street, Westminster, S. W., London, England.

Prof. HENDRIK A. LORENTZ, Zylweg 76, Haarlem, Holland.

Senator GUGLIELMO MARCONI, Royal Italian Senate, Rome, Italy.

Dr. T. C. MENDENHALL, Ravenna, Ohio.

Dr. A. A. MICHELSON, Professor of Physics, University of Chicago, Chicago, Illinois.
Dr. RALPH MODJESKI, 818 Widener Building. Philadelphia, Pennsylvania.

Rear Admiral JOSEPH B. MURDOCK, U. S. N. (Retired), Danbury, New Hampshire.
Prof. HEIKE KAMERLINGH ONNES, University of Leiden, Leiden, Holland.
Hon. Sir CHARLES A. PARSONS, 6 Windsor Terrace, Newcastle-On-Tyne, England.
General JOHN J. PERSHING, War Department, Washington, D. C.
Mr. RALPH W. POPE, 570 Cherry Street, Elizabeth, New Jersey.

Prof. THEODORE WILLIAM RICHARDS, Wolcott Gibbs Memorial Laboratory,
Harvard University, Cambridge, Massachusetts.

Rear Admiral WILLIAM S. SIMS, U. S. N., General Board, Naval War College, Newport, Rhode Island.

Mr. FRANK J. SPRAGUE, Consulting Engineer, President, Sprague Safety Control & Signal Corporation, 421 Canal Street, New York City, New York.

Major-General GEORGE OWEN SQUIER, War Department, Washington, D. C. Rear Admiral DAVID WATSON TAYLOR, U. S. N., 1813 19th Street, N. W., Washington, D. C.

Sir JOSEPH J. THOMSON, Trinity College, Cambridge, England.

Prof. WILLIAM CAWTHORNE UNWIN, Palace Gate Mansions, Kensington, London. England.

Dr. H. W. WILEY, Room 1120, Woodward Building, Washington, D. C.

CORRESPONDING MEMBERS

Professor A. S. EVE, McGill University, Montreal, Canada.

Mr. T. COMMERFORD MARTIN, 32 Grove Avenue, Larchmont Manor, New York. Prof. JOHN SEALY TOWNSEND, New College, Oxford, England.

Mr. ISAAC B. THORN.

IN MEMORIAM

MEMBERS

ABBOTT, ROBERT R., Metallurgical Engineer, The Peerless Motor Car Company, Cleveland, Ohio.

ACHESON, Dr. EDWARD G., Manufacturer, Acheson Corporation, Æolian Building, 35 West 42nd Street, New York City, New York.

ADAMS, HOWARD L., Managing Director, Keystone Institute, Reading, Pennsylvania. ADAMS, MERRITT, H., Works Manager, Vim Motor Company, 23rd & Market Streets, Philadelphia, Pennslvania.

ADDICKS, ALLEN, Engineer, Musician, 106 South 36th Street, Philadelphia, Penn

sylvania.

ADDICKS, WALTER R., President, Consolidated Gas Company of New York, 130 E. 15th Street, New York City, New York.

ADSIT, CHARLES G., Engineer 555 Electric and Gas Building, 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 Manufacturing Company, Lehigh Avenue and American Street, Philadelphia, 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, 8112 St. Martin's Lane, Chestnut Hill, Philadelphia, Pennsylvania.

ALLEN, JAMES, Brigadier General, U. S. A., Army and Navy Club, Washington, D. C. ALLEN, WILLIAM N., Retired Chemical Manufacturer, 557 Church Lane, Germantown, Philadelphia, Pennsylvania.

ALSBERG, Dr. CARL L., Stanford University, California.

AMES, Dr. JOSEPH S., Director Physical Laboratory, The Johns Hopkins University, Baltimore, Maryland.

ANDERSEN, OLAF, Geologist, Norges Geologiske Undersokilse, Kronprinsensgt 2, Kristiania, Norway.

ANDERSON, FRANK. Mining Engineer, 1172 Harvard Avenue, Salt Lake City, Utah. ANDERSON, Colonel GEORGE L., U. S. A., Electrical Engineer, Address unknown. ANDERSON, ROBERT J., Metallurgical Engineer, U. S. Bureau of Mines, Experiment Station, Pittsburgh, Pennsylvania.

ANDREAU, ROLAND L., Consulting Chemical Engineer and Research Chemist, Laurel Springs, New Jersey.

ANDREWS, W. S., Consulting Electrical Engineer, General Electric Company, Schenectady, New York.

ANGERER, VICTOR, Vice President, Taylor-Wharton Iron and Steel Company, P. O. Box 162, Ridley Park, Pennsylvania.

ARMSTRONG, WILLIAM R., Clerk, Powers-Weightman-Rosengarten Company, Philadel phia, Pennsylvania.

ARNOLD, Dr. H. D., Director of Research, Engineering Department, Western Electric Company, New York City, N. Y.

ARNY. Dr. H. V., Teacher and Chemist, 115 West 68th Street, New York City, New York.

ARRHENIUS. SVANTE AUGUST, Physicist, Nobel Institute, Stockholm, Sweden. ASEF, Dr. WALDEMAR, Research Chemist, Research Department, Pennsylvania Salt Manufacturing Company, Greenwich Point, Philadelphia, Pennsylvania. ASHBROOK, Dr. 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, The Locust, Pennsylvania Avenue, Atlantic
City, New Jersey.

ATKINSON, ROBERT, Instructor in Chemistry, Haverford College, Haverford, Penn-
sylvania.
ATLEE, JOSHUA W., Naval Architect. William Cramp and Son's Ship and Engine
Building Company, and for mail. Riverton, New Jersey.

ATLEE. WALTER, Civil Engineer. 218 East 20th Street. Baltimore, Maryland. ATTERBURY, W. W., Brigadier-General, Vice President, Pennsylvania Railroad Company, Broad Street Station, Philadelphia, Pennsylvania.

ATWATER, RICHARD M. Jr., Consulting Mining Engineer, Scarsdale, New York. AUSTIN. Dr. LOUIS W., U. S. Naval Radio Research Laboratory, Bureau of Standards. Washington, D. C.

AUSTIN, W. L.. Vice Chairman of the Board, The Baldwin Locomotive Works, 500 North Broad Street, Philadelphia, Pennsylvania.

AYRES, EUGENE E., JR., Chemical Engineer, Sharpes Specialty Company, 23rd and Westmoreland Streets, Philadelphia, Pennsylvania.

BACHE, DANIEL T., Student, 2102 Pine Street, Philadelphia, Pennsylvania.

BACON, Dr. RAYMOND FOSS, Chemical Engineer, Chemists Building, 50 East 41st Street, New York City, New York.

BAEKELAND, Dr. L. H., Research Chemist, Snug Rock, Harmony Park, Yonkers-onHudson, New York.

BAKER, FRANKLIN, Jr., Manufacturer Wayne Avenue and Hortter Street, Germantown, Philadelphia, Pennsylvania.

BAKER GEORGE FALES, Physician, 403 Lafayette Building, Philadelphia, Pennsylvania.

BALCH, ALFRED C., Publisher, 227 South 6th Street, Philadelphia, Pennsylvania.
BALCH, EDWIN S., Attorney-at-Law, 1634 Spruce Street, Philadelphia, Pennsylvania.
BALDWIN, FREDERIC E., (Retired) 2200 Walnut Street, Philadelphia, Pennsylvania.
BALLARD, R. H., Vice President and Assistant General Manager, Southern California
Edison Company. Edison Building, Los Angeles, California.
BALLENTINE, WILLIAM I., Vice President, Advance Rumely Company, La Porte,
Indiana.

BALLINGER, WALTER F., Architect, Twelfth and Chestnut Streets, Philadelphia,

Pennsylvania.

BALLS, Prof. WILLIAM H., 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., Lock Box 26, Boston, Massachusetts.

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, 7011 Cresheim Road, Mt. Airy, Philadelphia, Pennsylvania.

BARNHART, G. EDWARD, Aeronautical Engineer, 191 Marion Avenue, Pasadena,
California.

BARR, Major JOHN H., Mechanical Engineer, The Barr-Morse Corporation, Ithaca,
New York.
BARRINGER, DANIEL MOREAU, Geologist and Mining Engineer, 1242 Real Estate
Trust Building, Philadelphia, Pennsylvania.
BARTH, CARL G., Consulting Engineer, Room 216, 10 South 18th Street, Philadelphia,
Pennsylvania.
BARTOW, EDWARD, Chemistry Department, State University of Iowa, Iowa City, Iowa.
BASFORD, G. M., President, Locomotive Feed Water Heater Company, Room 719, 17
East 42nd Street, New York City, New York.
BASHORE, E. GORGAS, Consulting Chemical Engineer, The Texas Company, Port
Arthur, Texas.

BASSETT, WILLIAM H., Technical Superintendent, American Brass Company, Waterbury, Connecticut, and for mail, Cheshire, Connecticut.

BATES, C. W., Electrical Engineer, Philadelphia Electric Company, and for mail, 403 N. Narberth Avenue, Narberth, Pennsylvania.

BATES, ONWARD, Civil Engineer, 332 South Michigan Avenue, Chicago, Illinois. BEACH, CHARLES S., Designer and Machinist, 745 Main Street, Bennington, Vermont. BEALE, HORACE A., JR., President, Parkesburg Iron Company, Parkesourg, Pennsyl

vania.

BEALE, LEONARD, T., Secretary, John T. Lewis & Brother Company, 705 Lafayette Building, Philadelphia, Pennsylvania.

BEATH, E. R., Lapidist and Jeweler, 129 South 12th Street, Philadelphia, Pennsylvania. BECK, M. A., Vice President and Chief Engineer, Milwaukee Electric Crane and Manufacturing Company, 294 Greenbush Street, Milwaukee, Wisconsin.

BECKER, IRWIN A., Pharmacist, in care of Michael Reese Hospital, 2839 Ellis Avenue, Chicago, Illinois.

BELFIELD, T. BROOM, Manufacturer, 1905 Spring Garden Street, Philadelphia, Pennsylvania.

BELL, J. SNOWDEN, Attorney-at-Law, 129 Broadway, New York City, New York. BEMENT, WILLIAM P., (Retired), 743 Real Estate Trust Building, Philadelphia, lenn

sylvania.

BENNETT, C. E., Engineering Department, Georgia Railway and Power Company. Atlanta, Georgia.

BENNETT, FREDERICK M., Mechanical and Electrical Engineer, 2516 Harlan Street, 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, Compo Company, Ltd., 131 18th Avenue, Lachine, Canada.

BERRESFORD, A. W., General Manager, The Cutler-Hammer Manufacturing Company, and for mail 303 Hotel Astor, Milwaukee, Wisconsin.

BIDDLE, CHARLES M., JR., First Vice President, Supplee-Biddle Hardware Company, 517 Commerce Street, Philadelphia, Pennsylvania.

BIDDLE, ELIZABETH C., 400 South 15th Street, Philadelphia, Pennsylvania. BIDDLE, JAMES G., Importer of Scientific Apparatus, Wallingford, Pennsylvania. BIDDLE, ROBERT, President, Biddle-Gaumer Company, 3846-56 Lancaster Avenue, Philadelphia, Pennsylvania.

BIERBAUM, CHRISTOPHER H., Consulting Engineer, 1011 Mutual Life Building, Buffalo, New York.

BIGELOW, S. LAWRENCE, Professor of General and Physical Chemistry, University of Michigan, Ann Arbor, Michigan.

BILGRAM, HUGO, Machinist, 1235 Spring Garden Street, Philadelphia, Pennsylvania. BILLINGS, A. W. K., Civil, Mechanical and Electrical Engineer, Canadian and General Finance Company, Limited, 357 Bay Street, Toronto, Canada.

BILLOW, CLAYTON O., Consulting Engineer, 1431 Jarvis Avenue, Rogers Park, Chicago, Illinois.

BILYEU, THOMAS, Mechanical Engineer, 697 E. Broadway Street, Portland, Oregon. BINDER, RICHARD L., President, K. & B. Company, Special Electrical Supplies, 931 North 8th Street, Philadelphia, Pennsylvania.

BINNS, ARTHUR W., Steam Engineer, Morton, Pennsylvania.

BIRCH, GEORGE W., JR., Chemist, 19 Fairview Avenue, Highland Park, Delaware County, Pennsylvania.

BIRKINBINE, CARL PETER, Engineer, Room 800, Commercial Trust Building, Philadelphia, Pennsylvania.

BLACKBURN, ARTHUR, Grain Merchant, 315 Chamber of Commerce, and for mail, 5905 York Road, Baltimore, Maryland.

BLACKBURN, CAROLINE D., Chemist, 7028 Paschall Avenue, Philadelphia, Pennsylvania.

BLAIR, A. A., Analytical Chemist, 406 Locust Street, Philadelphia, Pennsylvania. BLATZ, FREDERICK J., Leather Manufacturer, P. O. Box 967, Wilmington, Delaware. BLUM, ARTHUR N., Mechanical Engineer, Delmar-Morris Apartments, Germantown, Philadelphia, Pennsylvania.

BODINE, SAMUEL T., President, the United Gas Improvement Company, Broad and Arch Streets, Philadelphia, Pennsylvania.

BOEKEL, J., Manufacturer of Metal Goods, 518 Vine Street, Philadelphia, Pennsylvania. BOERICKÉ, FELIX A., (Retired), Bryn Athyn, Pennsylvania.

BOERICKE, GIDEON, Civil Engineer, Wynnewood, Pennsylvania.

BOERICKE, JOHN J., Metallurgist, Secretary, Primos Chemical Company, and for mail, Merion, Pennsylvania.

BONINE, CHARLES E., Consulting and Designing Engineer, Franklin Trust Building, 20 South 15th Street, Philadelphia, Pennsylvania.

BOOZ, H. C., Chief Engineer, Berwind-White Coal Mining Company, 1100 Commercial Trust Building, Philadelphia, Pennsylvania.

BORIE, BEAUVEAU, Jr., Investment Broker, 511 Chestnut Street, Philadelphia, Penn

sylvania.

BORIE, RENSHAW, Engineer, McClellan & Junkersfeld, 112 South 16th Street, Phila

delphia, Pennsylvania.

BORTON, GEORGE W., President and General Manager, Pennsylvania Crusher Company, 1324 Stephen Girard Building, Philadelphia, Pennsylvania. BOSTWICK, J. VAUGHAN, St. Davids, Pennsylvania.

BOURNE, GEORGE L.. Vice President, Locomotive Superheater Company, 17 East 42nd Street, New York City, New York.

BOWEN, SAMUEL B., Manufacturer, 4th Street and Sedgley Avenue, Philadelphia, Pennsylvania.

BOWER, C. P., Civil Engineer, 11 Eastern Avenue, Wyndmoor, Montgomery County, Pennsylvania.

BRADSHAW, WILLIAM HENRY, Chemist, 38 East Essex Avenue, Lansdowne, PennRoad, Philadelphia, Pennsylvania.

BOYER, MURRAY C., Solicitor of Patents, 829 Stephen Girard Building, 21 South 12th Street, Philadelphia, Pennsylvania.

BRADBURY, Dr. ROBERT H., Science Teacher, Southern High School, 2100 Shunk Street, Philadelphia, Pennsylvania.

BRADDOCK-ROGERS, K., 125 West Park Avenue, Haddonfield, New Jersey. BRADLEY, A. J., Manufacturer, 101 Beekman Street, New York City, New York. BRADSHAW, WILLIAM HENRY, Chemist, 38 East Essex Avenue, Lansdown, Pennsylvania.

BRADY, EDWARD J., Engineering Research, 3101 Passyunk Avenue, Philadelphia, Pennsylvania.

BREED, GEORGE, Consulting Engineering, 277 Harvey Street, Germantown, Philadelphia, Pennsylvania.

BREWER, Dr. J. EDWARD, Chemist, 215 Summit Street, Norristown, Pennsylvania. BRIESEN, FRITZ V., Attorney-at-law, 25 Broad Street, New York City, New York. BRIGHT, J. I., Architect, Devon, Pennsylvania.

BRINLEY, CHARLES E., President, American Pulley Company, 4200 Wissahickon Ave., Philadelphia, Pennsylvania.

BRINTON, RUSSELL L., 3700 Kensington Avenue, Philadelphia, Pennsylvania. BROCK, JOHN W., Retired Attorney, 511 Bullitt Building, Philadelphia, Pennsylvania. BROMLEY, JOSEPH H., Manufacturer, Chelten and Wissahickon Avenue, Philadelphia, Pennsylvania.

BROWN, FRANCIS SHUNK, Lawyer, 1005 Morris Building, 1421 Chestnut Street, Philadelphia, Pennsylvania.

BROWN, J. STANFORD, P. O. Box 38, Black Hall, Connecticut.

BROWN, RICHARD P., President, Brown Instrument Company, Wayne and Windrim Avenue, Philadelphia, Pennsylvania.

BROWN, T. WISTAR, 3rd, Attorney, 230 Chestnut Street, and for mail, 5920 City Avenue, Philadelphia, Pennsylvania.

BROWNSTEIN, BENJAMIN, Mechanical Engineer, Elwood City, Pennsylvania. BRUNEL, ROGER F., Professor of Chemistry, Bryn Mawr College, Bryn Mawr, Penn

sylvania.

BRUNNER, FRANK A., Drawing Materials, 910 Filbert Street, Philadelphia, Pennsylvania.

BRUNKER, ROBERT J., Banker, 1000 Walnut Street, Philadelphia, Pennsylvania. BRUSH, CHARLES F., Electrical Engineer, 3725 Euclid Avenue, Cleveland, Ohio.