EDISON LABORATORY Edison National Historic Site West Orange, New Jersey Volume 1

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Photographic evidence indicates that the 144 . 486 Dickson and Dickson, The Life and Inventions Thomas Alva Edison, pp."487 Note that experimental rooms probably existed both the second and third floors.Floor, Period 1887-1900 Little evidence available about the configuration and uses the third floor of Building during Edison’s first years the West Orange laboratory.488 Building Third Floor, Lamp Test Room. 489 Dickson and Dickson, The Life and Inventions Thomas Alva Edison, 295; see also "Edison’s New Laboratory," Scientific American, September 17, 1887, 184. Building Third Floor, Recording Studio. The room was filled with large rack with connections for numerous lamps: "aggregation shining bulbs" Dickson described it. The large open space the west end this floor was devoted experiments with recording during this period.Building Third. Recording could therefore carried out in this large open room where there was also space for lectures and performances. This room was also the site experiments the phonograph the late 1890s. Efforts devise aJong playing record, cylinder six inch diameter, were made on the north side this floor the music room. Dickson mentions the lamp test room, the exhibit hall, and the lecture hall, which was formerly room "in use for musical experiments connection with the phonograph. 295-98. 487 The New Orleans Picayune, July 22, 1888. newspaper report described score of smaller apartments the building, each which fitted for some special object. 488 Memorandum, "Long-Playing Records," William Hayes Harold Bowen, undated (in 1914, Phonograph, Record, Manufacture). Although located the 1914 Document File, the memorandum was written much later there are references 1920’s experiments. This room was set carry out duration and efficiency tests Edison incandescent bulbs. The first recording machines were not sensitive enough require sound proofing of the studio with drapes fabric."486 There were several experimenting rooms this floor: some devoted chemical experiments find better waxes for records and others concerned with electrical experiments.489 Building Third Floor, Period II: 1901-1914 and Period III: 1915-1931 A survey the third floor found evidence numerous partitioned rooms and other changes the layout offices