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