Parker Hill-Fenway project no. Mass. R-48 : police signal system, fire alarm system and M.T.A. facilities
Description:
These maps depict the police signal system (signal box and cable locations), fire alarm system (handhole, manhole, alarm box and test post locations), Metropolitan Transit Authority facilities (manhole, surface car lines, subway and underground conduit locations) and the locations of the New England Telephone and Telegraph Co. manholes.