Proceedings of the stated meeting held Wednesday, November 20, 1912.

F R A N K L I N INSTITUTE (Proceedings of the Stated Meeting held Wednesday, November 20, I912.) VICE-PRESIDENT COLEMAN SELLERS,~[R., in the Chair. Additions to membership since last report, 9. The paper of the evening was presented by Alfred Noble,-C.E., LL.D., of New York, entitled, " T h e Railway Tunnels of New York City." A brief historical review of early tunnel projects served as an introcluction, which was followed by a detailed description of the tunnels which are now in use in the city of New York. The most approved systems of tunnelling, the various methods of carryling on the work without interference to traffic, and the obstacles met in tunnel construction, were given consideration. The paper was fully illustrated by numerous lantern slides of engineering details and views of tunnels in various stages of constructiofl. At the close of the paper the Chairman extended the thanks of the Institute to the speaker, and the meeting adjourned. R. B: OWENS,

Secretary.

COMMITTEE

ON SCIENCE

AND THE

ARTS.

(Abstract of Proceedings of the Stated Meeting held Wednesday, November 6, zpz2.) I-IALL OF TIlE FRANKLIN INSTITUTE, PHILADELPHIA,November 6, I912. DR. GEORGEA. HOADLEY in the Chair. The following report was presented for first reading: No. 252o.--De Vos' Rolling Sector Boat Davit. Advisory, Adopted. The following was accepted for examination: No. 252I.--The Hoo*ver Suction Sweeper, R. B. OwEns,

Secretary.

SECTIONS. Mechanical and Engineering Section.--A meeting of the section was held on Thursday evening, October 24, I912, at 8 o'clock, in the Hall of the Institute. Mr. George R. Henderson, Chairman. The Chairman introduced Mr. James Donald, Consulting Naval Architect 695