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