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Makes light speak like Biblical burning bush. Like the voice speaking to Moses from the burning bush as described in the Bible, Sergius P. Grace, Assistant Vice-President of the Bell Telephone Laboratories, makes speech and music issue from the burning electric arc in the center of the projector shown in the photograph. Alexander Graham Bell first experimented with the "talking flame" as early as 1875, using bright rays of sunlight as the base. Bell scientists are again working on the theory, hoping to make some practical use of it. Grace, at the left, is assisted by R.M. Pease, right, a member of the Bell technical staff. 1230
Summary
Two men in suits are looking at a large object, Library of Congress Harris and Ewing collection
Title from unverified caption data on negative or negative sleeve.
On sleeve: Watch Your Credit Line.
Gift; Harris & Ewing, Inc. 1955.
General information about the Harris & Ewing Collection is available at http://hdl.loc.gov/loc.pnp/pp.hec
Temp. note: Batch seven.
The Harris & Ewing, Inc. Collection of photographic negatives includes glass and film negatives taken by Harris & Ewing, Inc., which provide excellent coverage of Washington people, events, and architecture, during the period 1905-1945. Harris & Ewing, Inc., gave its collection of negatives to the Library in 1955. The Library retained about 50,000 news photographs and 20,000 studio portraits of notable people. Approximately 28,000 negatives have been processed and are available online. (About 42,000 negatives still need to be indexed.)
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