 Each of the recordings was cut on a "yellow paraffine" blank, an early type of solid-wax cylinder not used after circa March 1889. Very few sound recordings survive from this time period. Here on the left is a top view of the “Around the World on the Phonograph” cylinder.
 A close-up view of the sound groove on the “Around the World on the Phonograph” cylinder shows the nearly uniform groove width of Edison’s early square "chisel-cut" recording technique, used prior to November 1889.
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