...ex; it is situated in the cities of Medford and Somerville, and is maintained at the joint charge of those cities; the care of the bridge and the appointment of draw-tender devolves upon the city of Medford . The bridge over the Boston & Lowell Railroad at College avenue was built in 1861, by the town of Medford, and is the only bridge over that railroad whose maintenance is chargeable to Medford...