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Not peppermint candy but an airplane strut. Washington, D.C., May 3. This piece of aluminum alloy which is used in airplane construction is shown after being in the torque machine. The pieces to be tested are locked in the vise and twisted until they break. This piece when started the lines on the pipe were parallel and ran the length of t he pipe. After coming out of the machine the lines are like a corkscrew, before the breakig point is reached. A.E. McPhereson is applying the pressure, 531937
Summary
A black and white photo of a man working on a machine, Library of Congress Harris and Ewing collection
Title from unverified data received with the Harris & Ewing Collection on the negative or negative sleeve.
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 four.
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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