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Start Over You searched for: Date 1920 to 1929 Remove constraint Date: <span class="from" data-blrl-begin="1920">1920</span> to <span class="to" data-blrl-end="1929">1929</span>-
Laboratory assistant at mixed acid work bench
- 1920s
General view of a laboratory assistant, identified as "Mac May," posed at a work bench for mixed acid materials. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing…
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Laboratory assistant at mixed acid work bench
- 1920s
General view of a laboratory assistant, identified as "Mac May," posed at a work bench for mixed acid materials. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing…
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Laboratory bench attributed to U.S. Bureau of Standards
- 1920s
General view of a laboratory bench with assorted glassware and scientific apparatus. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing address, and postage. While…
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Unidentified woman in laboratory
- 1920s
General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. Notably, the photograph is printed as a…
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Unidentified man in laboratory
- 1920s
General view of an unidentified man, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…
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Unidentified woman in laboratory
- 1920s
General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…
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Unidentified woman in laboratory
- 1920s
General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…
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Unidentified woman in laboratory
- 1920s
General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…
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Unidentified man in laboratory
- 1920s
General view of an unidentified man, presumably a laboratory assistant, seated at a work bench with assorted scientific equipment and glassware. While the setting of this photograph is also unidentified, the photo was…
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Laboratory at the Hospital of the Rockefeller Institute for Medical Research
- 1925
General view of a laboratory bench at the Hospital of the Rockefeller Institute for Medical Research (H.R.I.M.R.) showing assorted laboratory glassware and scientific apparatus. The Rockefeller Institute for Medical…
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Laboratory at the Hospital of the Rockefeller Institute for Medical Research
- 1925
General view of a laboratory bench at the Hospital of the Rockefeller Institute for Medical Research (H.R.I.M.R.) showing assorted laboratory glassware and scientific apparatus. The Rockefeller Institute for Medical…
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Laboratory at the Hospital of the Rockefeller Institute for Medical Research
- 1925
General view of a laboratory bench at the Hospital of the Rockefeller Institute for Medical Research (H.R.I.M.R.) showing assorted laboratory glassware and scientific apparatus. The Rockefeller Institute for Medical…
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Quartz Spectrograph
- Circa 1924
A spectrograph is an instrument used to obtain and record a light spectrum—it splits the light from an object into its component wavelengths so that it can be analysed. The spectral lines of a chemical element is…
- Manufacturer Adam Hilger Ltd.
- Subject Adam Hilger Ltd., Spectrograph, Optics
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3 items
Quartz Spectrograph
- 1900 – 1925
A spectrograph is an instrument used to obtain and record a light spectrum—it splits the light from an object into its component wavelengths so that it can be analysed. The spectral lines of a chemical element is…
- Subject Spectrograph, Optics
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Bureau of Chemistry Protein Investigation Laboratory
- 1913 – before 1928
General view of employees at work in the Bureau of Chemistry's Protein Investigation Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Protein…
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Bureau of Chemistry Oil, Fat, and Wax Laboratory
- 1901 – before 1928
General view of two employees working in the Bureau of Chemistry's Oil, Fat, and Wax Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Oil, Fat, and…
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Bureau of Chemistry Nitrogen Laboratory
- 1901 – before 1928
General view of an employee operating an apparatus used to study ammonia at the Bureau of Chemistry's Nitrogen Laboratory. Part of the U.S. Department of Agriculture, the Nitrogen Laboratory conducted investigations…
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Bureau of Chemistry Nitrogen Laboratory
- 1901 – before 1928
General view of the Bureau of Chemistry's Nitrogen Laboratory showing assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Nitrogen Laboratory conducted investigations into…
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Bureau of Chemistry Nitrogen Laboratory
- 1901 – before 1928
General view of an employee conducting an analysis of an unidentified substance in the Bureau of Chemistry's Nitrogen Laboratory. Part of the U.S. Department of Agriculture, the Nitrogen Laboratory conducted…
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Bureau of Chemistry Drug Laboratory
- 1901 – before 1928
General view of two employees at work in a Bureau of Chemistry Drug Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, such laboratories commonly…
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Agricultural Research Service Drug Laboratory
- 1901 – before 1928
General view of two employees at work in an Agricultural Research Service Drug Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, such laboratories commonly…
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Naval Stores Investigation Laboratory
- 1901 – before 1928
General view of three employees at work in the Bureau of Chemistry's Naval Stores Investigation Laboratory, a division of the Leather and Paper Laboratory. Assorted laboratory glassware and apparatus, as well as notices…
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Bureau of Chemistry Carbohydrate Laboratory
- 1913 – before 1928
General view of the Bureau of Chemistry's Carbohydrate Laboratory showing assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Carbohydrate Laboratory analyzed the physical and…
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Bureau of Chemistry Carbohydrate Laboratory
- 1913 – before 1928
General view of the Bureau of Chemistry's Carbohydrate Laboratory showing assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Carbohydrate Laboratory analyzed the physical and…
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Bureau of Chemistry Water and Beverage Laboratory
- After 1901 – 1928
General view of an employee in the Bureau of Chemistry's Water and Beverage Laboratory conducting an analysis on an unidentified substance. Assorted sample jars and scientific apparatus are visible in the photograph.…