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