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