Treated hewn ties, area c, tie treating plant General yard Tie treating plant Tie treating plant Tie treating plant Tie-treating plant Tie-treating plant Tie-treating plant - treated ties Tie treating plant Track equipment - Dartmouth-Huntington frog Track equipment - Dartmouth-Huntington frog Track equipment - frog Track equipment - Dartmouth-Huntington frog Track equipment Tie-treating plant Tie-treating plant Tie-treating plant, general yard Steamroller Mixer loader Mixer loader Mixer loader Mixer loader Storehouse Grinder Greasing machine on el at Thompson Sq. Greasing machine on el at Thompson Sq. Greasing machine on el at Thompson Sq. Air machine type BXA trade vibrator Track vibrator Tie plant Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Cheatham electric switching device Sceeder International Steel tie A.W. Green Bespectacled man writing at a desk Boston elevated office employees outing at Riverside, MA Group portrait, Boston Elevated Railway, Cambridge Subway, Central Sq. Office Engineering Staff Desk decorated with crepe paper Entrance to Old State House Station, sec.E, E.B.T., Boston, Mass., January 7, 1904 Looking south in sec.B, EBT, showing air duct
