Changes in sec.5 showing bracing at southerrly end Bracing and new work southerly end sec.5, near Pleasant S, Tremont St. side Changes near Pleasant St. bridging under Shawmut Ave. tracks Changes near Pleasant St. showing new platform for elevated cars Showing excavating plant in use on sec.B, EBT Sec.A, EBT, looking south from Sumner St. Sec.A, EBT, looking north in Maverick Sq. from Sumner St. View of front end of roof shield for sec.B, EBT One half of front end of roof shield for sec.B, EBT Detail of interior of shield for sec.B, EBT Half of shield for sec.B EBT, front end Makinng preparation for lowering shield for sec.B, EBT Half view of front end of shield for sec.B, EBT View of interior of shield for sec.B, EBT Detail of interior of shield, looking through door in front end Bottom of trench seec.B, EBT lower part of shield and centering Railway form shaft of sec.B, EBT, to cars of B+M RR Centring under rear end of shield sec.B, EBT Work on sec.B, EBT, bottom of trench showing lower part of shield Elevator shaft and ry. trestle sec.B, EBT, looking south Elevator shaft and concrete mixer, sec.B, EBT View of compressor room, sec.B EBT Interior of sec.B, EBT at shaft looking north View of air locks sec.B, EBT from outside Looking towards shield from upper platform sec.B, EBT Showing steel ribs, tracks, and bottom of shield sec.B, EBT Air locks sec.B,EBT from inside compressed air Looking southerly on Lewis St. showing paving Paving on Lewis St. near Marginal St., E.B. Looking northerly on Lewis St E.B. showing settlement Showing commotion in water caused by leakage of air from sec.B, EBT Showing settlement of Lewis St. over sec.B, EBT looking northerly Buildings on south side of State St. near Atlantic Ave. Showing condition of pavement n.e. corner of Washington + Hanover Sts. Northeast corner Hanover St. and Washington Sts., looking easterly, Boston, Mass., November 4, 1901 Completing ventilating chamber corner of Hanover and Washington Sts. Completing ventilating chamber sec.10, showing street occupation Excavation on south east side of Lewis St. Excavation for building opposite plant of sec.B, EBT, s.e. side of Lewis St . Jacking up sec.B shield for removing shoe Jacking up sec.B shield for removal of shoe Bottom of roof shield sec.B showing showing broken plate State St. looking e. from w. of Chatham and showing street blocked on account of changing pipes State St. at India St. looking towards Atlantic Ave. State Street at India Street looking west from east side of Commecial Street, Boston, Mass. Looking west on State St. from easterly corner of Commercial St. Space occupied by beams piled on west side of Custom House, India Street, Boston, Mass. Showing relative positions of irongate and field office commercial State Street from westerly steps of Custom House, Boston, Mass. Sec.B, comparative tests of concrete for different mixtures
