Charles River Bridge masonry surfaces, stone and concrete Charles River Bridge span 4 centering Charles River Bridge span 8 Hammering arch ring Charles River Bridge span 5arch ring forms completed Charles River Bridge pier 12 surfaces of stone and concrete Foundations opposite cab stand North Station Causeway Street foundation at Fitchburg Station, Boston, Mass. Charles River Bridge progress on Prison Pt. Bridge Charles River Bridge Charles River Bridge progress view from lock tower Charles River Bridge from freight yard Charles River Bridge pouring the jack arches spen #6 Charles River Bridge concrete mixer elevator etc. Charles River Bridge Charles River Bridge Charles River Bridge pouring jack arches Charles River Bridge rods in jack arches Charles River Bridge Charles River Bridge forms for balustrade Charles River Bridge wire forms, etc. Charles River Bridge concrete forms Prison Point St. Charles River Bridge forms etc. Prison Point St. entrance Charles River Bridge suspended I beams etc. Charles River Bridge, balustrade forms, etc. Charles River Bridge, spandrel forms Charles River Bridge jack auch forms taken down Charles River Bridge top of conduit box baustrade rods, etc. Charles River Bridge, rods, logging, etc, pier #8 Charles River Bridge, pier #10 Charles River Bridge top of pier #8 rods and forms Charles River Bridge progress view Charles River Bridge pouring floor etc. Charles River Bridge Charles River Bridge Charles River Bridge Prison Point St. span Charles River Bridge e. side Charles River Bridge south from Prison Point Street, Cambridge, Mass. Charles River Bridge n. from Prison Pt. St. Charles River Bridge Charles River Bridge casting house Charles River Bridge casting trolley poles Charles River Bridge Charles River Bridge Charles River Bridge Charles River Bridge Charles River Bridge Charles River Bridge Charles River Bridge Bumper at Charles River Bridge Charles River Bridge