. The street railway review . kness. The tunnel onthe East Boston side has grades of from to 5 per cent and at a ^ ^^^^^R^^^^^^^^*^^^PS3H|^^^^^H ^ ^^^^^^^^^H ^HH -jji^gBy 1 ^p ^^^H ^^^^1 ^K^^^^SSiSn^ > IX^ il ^^^^^^^^^^^B ^^B^H^^^^^«^^H9l^^r f i4Mf^ 1 ^^^^^HB ^^t^HH^^T^ . • .t^ ^TivJ ^BR m. i_ ^^^^^^B 1 CHARLESTOWN IlKIIii;i; FKiiM CITY CHARLESTOWN. point 250 ft. soutliwestcrly from the Harbor Commissioners line isabout 100 ft. lower than in Maverick Sq. A length of about 1,350ft. in mid harbor is nearly level. Grades of 5 per cent occur on theBoston side but are of short length o
. The street railway review . kness. The tunnel onthe East Boston side has grades of from to 5 per cent and at a ^ ^^^^^R^^^^^^^^*^^^PS3H|^^^^^H ^ ^^^^^^^^^H ^HH -jji^gBy 1 ^p ^^^H ^^^^1 ^K^^^^SSiSn^ > IX^ il ^^^^^^^^^^^B ^^B^H^^^^^«^^H9l^^r f i4Mf^ 1 ^^^^^HB ^^t^HH^^T^ . • .t^ ^TivJ ^BR m. i_ ^^^^^^B 1 CHARLESTOWN IlKIIii;i; FKiiM CITY CHARLESTOWN. point 250 ft. soutliwestcrly from the Harbor Commissioners line isabout 100 ft. lower than in Maverick Sq. A length of about 1,350ft. in mid harbor is nearly level. Grades of 5 per cent occur on theBoston side but are of short length owing to the intervention of theCommercial St. station. At this point the platform for west-boundcars is immediately above that for the east-bound, their depths be-low the street being respectively about 50 and 66^4 ft. Pump wellsand chambers under the harbor and ventilating chambers on eachside of the harbor are included in the section. Ventilation of thatportion of the tunnel under the harbor will be effected with the aid. of a segmental duct of about 4S_ sq. ft. cross section in the top ofthe tunnel. Near the middle of the harbor this duct will communi-cate with the tunnel below by a door. The shore ends of the ductwill open into ventilating chambers through which the air can bedrawn out. The members of the Boston Transit Commission are: George , chairman; Charles H. Dalton, Thomas J. Gargan, GeorgeF. Swain, Horace G. Allen. Howard A. Carson is chief engineerand B. Lcightnn Bell, secretary. KANSAS CITY-ST. JOSEPH R. R. Owing to the extremely fine weather which has prevailed thusfar during the winter, the work upon the Kansas City & St. Jo-seph Electric R. R., mentioned in our issue for January, page 55,has progressed very rapidly. The engineers in charge are fromthe Osborn Engineering Co., of Cleveland, O., and have had awide experience in interurban work; their views of this enter-prise are very flattering. According to the engineers survey the maximum grade will
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
