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