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At the launching of the S. 8S. President Coolidge at the Newport News WShip- building & Dry Dock Co., Newport News, Va., Feb. 21, 1931, left to right: R. Stanley Dollar, Mrs. R. Stanley Dol- lar, Mrs. Calvin Coolidge, the sponsor, Mrs. John Coolidge, her daughter-in-law and Miss Diana Dollar centrifugal oil pump which also sup- plies the lubricating system. These turbines are also fitted with solid forged rotors, a construction which has been applied on several hundred turbines in service ashore and which because of its inherent sturdiness and stability of balance is’ especially adapted for marine service. The main motor ventilation is furnished by Westinghouse propeller type blowers. Power for excitation and auxiliaries is furnished by four Westinghouse 500-kilowatt, 240/120 volt direct cur- (Continued on Page 56) Abowe — The Se President Coolidge afloat after the launching at Newport News Feb. 21 At Left—Mrs. Calvin Coolidge christens the new vessel the S. 8S. President Coolidge. Water taken from a brook near the for- mer President’s birth- place, Plymouth, Vt. was used in the chris- tening ceremony. Homer lL. Ferguson, president of the New- port News Shipbuild- ing & Dry Dock Co. is seen standing be- side Mrs. Coolidge # MARINE REVIEw—March, 1931 ri.