.......................................................................................................................................................... 141
Building Room ........................ 165
Ediphone Development.......................................................... 144
Building Third Floor, Recording Studio ................................................... 164
Building Machine Shops.......................................... 144
Building Third Floor, Lamp Test Room ......................................... 137
Building Precision Machine Shop, Period III: 1915-1931 ................................ 165
Engineering Department ................................................................... 160
Building ............................................................................................................................................................................. 165
Building General ......................................... 143
Building Drafting Room, Period III: 1915-1931 ................... 139
Building Second Floor Vacuum Pump Room and Glass
Blower’s Room, Period 1887-1900 .... 153
THE POST-EDISON YEARS: Period IV: 1932-1962 .......................Building Precision Machine Shop, Period II: 1901-1914 ...................................................... 146
Building Third Floor, Educational Film Studio............. .......... 166
vi
............ 163
Building Library ..................... 140
Building Second Floor Experimental Rooms, Period 1887-
1900 and Period II: 1901-1914........................................................ 141
Building X-Ray Room................... 152
Building Powerhouse, Period 1887-1900 ...................................... 142
Building Drafting Room, Period 1887-1900 and Period II:
1901-1914 ............... 151
Albert Petit’s experimental room ................................................................................................ 152
Photographic department.......................................................... 152
Fred Ott’s experimental room. 162
Building Pattern Shop........................................... 153
Building Period II: 1901-1914................................................................. 154
Building .... 144
Building Third Floor, Period II: 1901-1914 and PeriodIII:
1915-1931 ................................................................................................................................................................................................. 165
Historical Research Department....................................................................................................................... 143
Building Third Floor, Period 1887-1900 .. 141
Building Second Floor Experimental Rooms, Period III:
1915-1931 . 162
Building ... 144
Building Third Floor, Storage Battery Test Department....................................... 151
Building Third Floor, Music Room ....... 161
Building Chemical Store Room................. 151
Building Third Floor, Offices (South Side) ..................... 146
Building Third Floor, Central Open Area............ 140
Building Second Floor Vacuum Pump Room and Glass
Blower’s Room, Period II: 1901-1914.............. 154
Historical Occupancy and Furnishings.......................................
