Machine performs half a day's manual labor,HJ Keegan,spectrophotometer,1936

Title: Machine performs half a day's manual labor in 5 minutes. Washington, D.C., Dec. 22. H.J. Keegan of the U.S. Bureau of Standards, using the spectrophotometer to determine the different colors in a piece of cloth. It formerly took a man a half a day to make this spectrum analysis but now the machine does it in five minutes. The machine measures the % of light transmitted or reflected at various wave lengths in the visible spectrum
Creator(s): Harris & Ewing, photographer
Date Created/Published: [19]36 December 22.
Notes:
Title from unverified data 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.
Subjects:
United States--District of Columbia--Washington (D.C.)
Bookmark /hec2009008577/
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