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9 résultats pour : early 1900s scientist

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Photographie
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Photographie

Woman scientist in a laboratory ca. between 1909 and 1923
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Woman scientist in a laboratory ca. between 1909 a...

Woman scientist in early 20th century ca. between 1909 and 1923
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Woman scientist in early 20th century ca. between ...

Mrs. F.W. Patterson engaged in scientific research for over 20 years, comparing studies of fungus diseases of plants ca. between 1910 and 1920
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Mrs. F.W. Patterson engaged in scientific research...

Woman scientist with experiment ca. between 1909 and 1923
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Woman scientist with experiment ca. between 1909 a...

L to R: Miss Lucia McCollock, Miss Mary Bryan, Miss Florence Hedges, The women scientists make cultures of the parasites, create experiments and do all sorts of technical laboratory work ca. 2 January...
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L to R: Miss Lucia McCollock, Miss Mary Bryan, Mis...

Charles Greeley Abbot, astrophysicist
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Charles Greeley Abbot, astrophysicist

Government scientists conducting tests on electrical current circa 1938.
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Government scientists conducting tests on electric...

Government Waste - Bureau of Standards designs mechanical batter to determine liveliness of baseballs, an example of government wasting money during the Great Depression circa 1938 .
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Government Waste - Bureau of Standards designs mec...