...covers eighteen census tracts of the main downtown business and industrial district of Boston; for each block lists total number of structures by type, age distribution and fire insurance rates, as well as detailed physical characteristics (condition, type of heating, size, safety features, storage area, number and type of passenger and freight elevators, occupancy characteristics, tax assessment of both land and building, type of structure - whether restaurant, bank, office, etc.; while the survey is extremely detailed, it does not cover individual buildings (unless the building is the only one on a block) and buildings' names are not given...