Altogether there are 420 cars in the rapid transit service, the older cars weighing about 34 tons with seating capacity of 48 and the newer type as used in the Cambridge Subway 43 tons each, arranged to seat 72 passengers. On account of the limiting clearances in the old subway the Cambridge cars cannot be used on the main line. All cars are motor cars and no attempt is made to use trailers. Each car is equipped with two motors and multiple unit control. [Illustration: LATEST TYPE OF STEEL MOTOR CAR USED IN CAMBRIDGE SUBWAY] [Illustration: MAIN LINE TRAIN—BOSTON ELEVATED RAILWAY] [Illustration: INTERIOR OF SUBSTATION EQUIPPED WITH 2000-KW. SYNCHRONOUS CONVERTERS] ------------------------------------------------------------------------ BROOKLYN RAPID TRANSIT SYSTEM The Brooklyn Rapid Transit Company controls all of the elevated and surface lines in Brooklyn including those reaching Coney Island. It also has entrance to Manhattan over the lines of the New York Municipal Railway Corporation, which was organized by the B. R. T. to finance and construct a part of the new city lines allotted to the B. R. T. The New York Municipal line runs through the new Broadway subway as far north as 60th St. thence east through the 60th St. tunnel under the East River to a connection with the Astoria and Corona lines in Queens. Other subway and bridge routes have been completed during the past few years as part of a definite plan, which contemplates the elimination of the present stub end operation at the lower end of Manhattan. [Illustration: STANDARD NEW YORK MUNICIPAL MOTOR CAR EQUIPPED WITH GE-248 MOTORS] The Brooklyn Bridge line built in 1883 and the Brooklyn Elevated R. R. in 1888 formed the nucleus of the present Brooklyn Rapid Transit system. Electrical equipment was tried out in 1898 and additional motor cars were put in service in 1902. This improvement rapidly displaced the “steam dummies” and facilitated the extension of lines and the handling of a rapidly increasing traffic. Of the present lines on the Brooklyn Rapid Transit system 89.20 miles of route aggregating 258.35 miles on a single track basis can be classed as rapid transit lines and operate multiple unit trains with third rail current collection. This includes the several elevated branches in Brooklyn and the newer subway lines of the dual system all of which are operated by the New York Consolidated R. R. Co., which is the operating organization. The lines of the Brooklyn Rapid Transit system, which are operated by the New York Consolidated R. R., according to figures for the year ended June 30, 1921, handled 404,970,640 passengers over the rapid transit lines. _Power Supply_ The original power equipment consisted of engine-driven direct-current generators, which have gradually been retired due to obsolescence. [Illustration: RAPID TRANSIT LINES OPERATED BY NEW YORK CONSOLIDATED R. R. CO.]