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