Close-up view of an electrolytic apparatus at a laboratory work bench attributed to the U.S. Bureau of Standards. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing…

General view of an unidentified laboratory facility looking toward the chief's office from the perspective of the supply store, with a side view of various offices and work benches. Notably, the photograph is printed as…

General view of an unidentified laboratory facility looking toward the supply store from the perspective of the chief's office, with inscriptions indicating the location of offices and work benches associated with…

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…

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…

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…

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…

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…

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…

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…

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…

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…

General view of an unidentified man, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus, including a microscope. While the setting of this photograph is also unidentified, the…

General view of an unidentified man, presumably a laboratory assistant, seated at a work bench while examining an unknown substance. While the setting of this photograph is also unidentified, the photo was donated along…

General view of British physiologist Sir Joseph Barcroft (1872-1947) examining a pumping apparatus in a laboratory at Cambridge University. A Fellow of the Royal Society, Sir Barcroft held the chair of physiology at…

General view of British physiologist Sir Joseph Barcroft (1972-1947) and an unidentified assistant performing a splenectomy, i.e. the complete removal of the spleen, on a dog. A Fellow of the Royal Society, Sir Barcroft…

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…

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…

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…

Portrait of (left to right) Dr. Albert Baird Hastings (1895-1987) and Dr. James A. Hawkins posed in a laboratory at the Hospital of the Rockefeller Institute for Medical Research (H.R.I.M.R.). Best known for the study…