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Candid photograph of Mary at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of a girl chasing fireflies in a grassy, wooded area. The photograph has a caption that reads "From behind a tree, Mary spies another flash. She creeps upon it carefully."
Candid photograph of an unidentified boy holding a net full of fireflies inside a lab at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of four boys at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of four boys with nets walking down the steps to catch fireflies.
Candid photograph of seven unidentified boys in a lab at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of seven boys with a caption that reads "Lightning-bug project--kids bringing in the bugs."
Candid photograph of an unidentified man weighing fireflies while a boy looks on at the McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of children at the Demonstration School
(Johns Hopkins University Sheridan Libraries, 1950-07-01)
Outdoor candid photograph of children participating in the closing day activities.
Candid photograph of an unidentified man and boy at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
Candid photograph of a man emptying lightning bugs into a bottle while a boy looks on, holding the bottle. The photograph has a caption on the back that reads "With help of researcher he empties bugs into bottle for counting."