File:Arnold O. Beckman and William Ballhaus Sr. 1967 Feedback 2012 002 488 474299495.tiff

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	20:11, 29 August 2019		3,202 × 2,562, 2 pages (23.54 MB)	commons>Mary Mark Ockerbloom	== {{int:filedesc}} == {{Photograph \|photographer = {{unknown}} \|title = William F. Ballhaus, Sr. and Arnold O. Beckman \|description = William F. Ballhaus, Sr. (standing) and Arnold O. Beckman (seated) Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories, Arnold O. Beckman, Inc., and Beckman Instrume...

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Image title	HyperFocal: 0
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ISO speed rating	50
Date and time of data generation	12:55, 12 August 2016
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Date and time of digitizing	12:55, 12 August 2016
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