Columbia University [Man working with unidentified scientific equipment.]
[Man working.]
Gas laboratory
[Man at a desk of equipment at NBC studios.]
[Man operating equipment at Radio City Music Hall.]
[Interior, possibly a basement, with unidentified equipment.]
[Man operating equipment, Radio City Music Hall.]
[Man working with lead.]
[Men working on sidewalk.]
[Man working on a camera lens.]
[Food exhibit, man at tables with preserves.]
Manhattan College. Interior, testing laboratory
Scientific American, Interior General Office, 15th Floor.
[Man with fishing net.]
Interior, shoe factory with man at machine