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