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