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