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