Category:Paul R. Heyl
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Paul R. Heyl (1872 – 22 October 1961) was an American inventor, physicist, and author.
American physicist and writer  | |||||
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| Date of birth | 1872 Philadelphia | ||||
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| Date of death | 22 October 1961 | ||||
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Media in category "Paul R. Heyl"
The following 8 files are in this category, out of 8 total.
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Dr. P.R. Heyl (...)snth weighing machine LCCN2016871521.jpg 8,036 × 9,995; 10.36 MB
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Dr. P.R. Heyl (...)snth weighing machine LCCN2016871521.tif 8,036 × 9,995; 153.22 MB
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Dr. Paul R. Heyl of Bu. of Standards, 6-6-25 LCCN2016850438.jpg 4,311 × 5,932; 2.6 MB
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Dr. Paul R. Heyl of Bu. of Standards, 6-6-25 LCCN2016850438.tif 4,311 × 5,932; 24.39 MB
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HEYL, PAUL R., DOCTOR LCCN2016862271.jpg 8,148 × 10,339; 6.16 MB
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HEYL, PAUL R., DOCTOR LCCN2016862271.tif 8,148 × 10,339; 160.7 MB
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snth_weighing_machine_LCCN2016871521.jpg)
