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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 an unidentified man weighing fireflies while a boy looks on at the McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
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."
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 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 boy holding a net full of fireflies inside a lab at McCollum-Pratt Institute
(Johns Hopkins University Sheridan Libraries, 1952)
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."