SHORE, A. F.

Scleroscope.-1909.

SHUMAN, F. S.

Wired Glass.-1894.

SHUMAN, F.

Concrete Pile for Foundations.-1904.

SMITH, R. C.; OTIS, SIDNEY; IHLDER, J. D.; Sundh, August.
Electric Elevator.-1902.

SOULE, SAMUEL W.; GLIDDENS, CARLOS; SHOLES, C. LATHAM.
Typewriter.-1875.

SPEIDEL, J. G.

Hoisting Machines.—1891.

SPELLIER, L. H.

Electric Clock.-1887.

SPENCER, J. E., AND FIELD, D. W.

Damper Regulator.—1893.

SPERRY, E. A.

Gyroscope Compass.-1914.

SPIELMAN, A.

Cloth Cutting Machine.-1914.

SPIRO, C.

Barlock Typewriter.-1894.

SPRATT, ORLANDS W.

Mercury Seal Trap.-1885.

SPRINGER, ALFRED, AND ROEder, F. A.

Torsion Balance.-1891.

SQUIER, G. O., AND CREHORE, A.

Polarizing Photo-Chronograph.-1896.

STACKHOUSE, THOMAS H.

Diagraph.-1895.

STAHLBERG, C.

Time Dating Stamp.-1891.

STARR, J. E.; BRANSON, DAVID; THORNBURGH, R. D.; FULLER, J. E.

Refrigeration Process.-1894.

STEINBART, ALFRED, AND UEHLING, EDWARD.

Pneumatic Pyrometer.-1898.

STEINBART, ALFRED, AND UEHLING, EDWARD.

Gas Composimeter.-1899.

STELLWAGON, H. S.

Sounding Apparatus.-1848.

STIERINGER, L.

Improved Method of Electric Illumination.-1902. STREET, CLEMENT F.

Locomotive Stoker.-1915.

STRICKLAND, W.

Substitution of Lime for Salt for Preserving Lumber.—1840.

SUNDH, AUGUST; OTIS, SIDNEY; SMITH, A. C.; IHLDER, J. D.

Improved Methods in the Manufacture of Steel.-1908. TATHAM, B., AND BRITTIN, J. W.

Safety Catch for Elevators.-1875.

TATTERSALL, ALFRED R.

Flour Mill.-1917.

TAYLOR, C. M., JR.

Absorption Process for Butter Making.-1903.

TEAL, C. A.

Portable Hoist.-1889.

THOMAS, ALMER, AND MERKET, Luzerne.

Tempered Copper.-1891.

THOMSON, ELIHU.

Electric Welding.-1889.

THOMSON, ELIHU.

Constant Current Arc Light Transformer.—1901.

THORNBURGH, R. D.; STARR, J. E.; BRANSON, DAVID; FULLER, J. E.

Refrigeration Process.-1894.

THUM, CHARLES D.

Varnish Brushes.-1854.

TIRRILL, A. A.

Voltage Regulator.-1910.

TIRRELL, J. P.; REYNOLDS, J. R.; PALMER, F. S.

Engine Stop and Speed Limit System.-1906.

TOWNSEND, ISAAC.

Tent Fastening.-1885.

TWEDDELL, R. H.

Method of Applying Hydraulic Power to Mechanical Work.—1894. TYLER, PHILOS B.

Shifting Gauge Cock for Steam Boilers.-1835.

TYSON, CHARLES.

Machine to Unite Uppers to the Soles of Shoes.-1875.

UEHLING, EDWARD, AND STEINBART, ALFRED,

Gas Composimeter.-1899.

UEHLING, EDWARD, AND STEINBART, ALFRED.
Pneumatic Pyrometer.-1898.

VAN KANNEL, T.

Storm Door.-1890.

VAUCLAIN, SAMUEL M.

Truck Wheel Centres.-1891.

VILLEROI, M.

Telescope.-1849.

VOYNOW, C. B., AND NICHOLS, H. B.

Cast Zinc Joint for Rail Bonding.-1904.

WAHL, J. C., AND GOLDBERG, H. E.

Adding Machine.-1916.

WAIT, W. B.

Machine for Tangible Writing for Touch Reading.—1900. WALE, GEORGE AND COMPANY.

Projection Lantern.-1875.

WALSH, E. M. AND SYDNEY B.

Method of Making Large Objects from Pieces of Aventurine.-1902. WALSH, SYDNEY B. AND E. M.

Method of Making Large Objects from Pieces of Aventurine.-1902. WALTER, L. H.

Method of Detecting Electrical Oscillations.—1907.

WALTER, B.

Electric Switch.-1905.

WEBSTER, W. R.

Apparatus for Observing the Relations between the Chemical Constitution and Ultimate Strength of Steel.-1897.

WEHNELT, A.

Interrupter for Induction Machines.—1905.

WELIN, A.

Life Saving Appliances on Board Ship.-1910.

WESTINGHOUSE, George, Jr.

Railway Car Brake.-1874.

WETZEL, F. J.

Automatic Mechanical Stoker.-1909.

WHARTON, WILLIAM, JR.

Safety Railway Switch.-1873.

WHEELER, S. S.

Electric Fan.-1904.

WHITALL, HENRY.

Planisphere.-1883.

WHITE, O. C.

Adjustable Extension Movement in Ball and Socket Joints.-1889.

WIEDIG, H. P.

Chemical Fire Extinguisher.-1894.

WIGMORE, WILLIAM H., AND DOERR, JOHN H.

Sleeping Car.-1885.

WILKIN, J. T.

System of Generating and Forming Cycloidal Surfaces.-1894.

WILCOX, CHARLES H., AND CARLETON, CYRUS.

Automatic Tension and Improved Sewing Machines.-1875.

WILLANS, P. W.

Steam Engine.-1895.

WILLIAMS, C. D.

Revolving Show Window.-1892.

WILLIAMS, JOHN N.

Typewriting Machine.-1897.

WILLMUNDER, H.

Swivel Loom.-1898.

WILLS, SAMUEL.

Journal Bearing and Car Axle-Box.-1885.

WINSLOW, S. E.

Pivot Scale Beam.-1840.

WIRT, CHARLES.

Rheostat.-1902.

WOOD, R. W.

Diffraction Color Photography.-1907.

WOOD, THOMAS.

Fountain Pen.-1839.

WOODBURY, C. J. H.

Electric Light Main Testing Apparatus.—1884.

WOODRUFF, W. N.

System of Keying for Machinery.-1888.

WOOTTEN, J. E.

Locomotive and Boiler.-1890.

WURTZ, A. J.

Lightning Arrestors and Non-Arcing Metal.-1894.

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.