Photographs
Pavlov is standing in front of a building with his arms folded.
Lewis is standing in front of a row of hedges, facing the camera with a pipe in his hands. There is a shingled building in the background.
Lewis standing in front of a building facing the camera. He is holding a vial or flask in his left hand.
Dawson is seated at a table with several glass petri dishes around him and a small lamp above the workspace. He is looking at the camera, and his body is angled to the right of the frame. His left hand is on a binocular scope in front of him.
Dawson is standing in front of a row of hedges with his hands in his pockets. He is facing the camera and there is a tree and building visible in the background.
Detlefsen is standing, while facing the camera, and a good distance from a building.
Goldberg is sitting next to a lab bench with a microscope.
Hemmeter is standing at a lab counter using a microscope. There is a book open on the counter in front of him. There are cabinets underneath the counter and lab equipment above it.
Jansen sitting at his lab bench with a microscope.
J. Bellings sitting at a table reading a book. On the table in front of him is a microscope and behind him on the wall are shelves containing various papers and books.
Bjerrum is seated in a room with many wooden benches lined up in it; perhaps a lecture hall or classroom. He is facing the camera.
Bronfenbrenner sitting at his desk writing.
Chuan Wen sitting at a lab bench with a microscope and many Petri dishes scattered around on the table.
Unidentified man in casual work clothes standing in front of a hedge smiling at the camera. Both hands are in his pockets and he is wearing athletic shoes with black socks over his pants up to his knees.
J. F. McClendon standing next to a table with a microscope. Also on the table are two glass containers and on the wall behind him are two empty shelves.
J. Genther sitting at a table with three microscopes sitting in front of her. Behind her on the wall are two shelves with various papers and books.
J. Gordon sitting at a table with a large book in front of her. Behind her against the wall is another table with various glassware.
Gray sitting at a lab bench with an open book placed next to a microscope.
Gray sitting at a lab bench with a microscope.
Gray is sitting at a desk with a microscope and an open book.
J. H. Ashworth sitting in a chair in front of a wall with a shelf of marked glass bottles.
Bodine standing in front of a building, with his hands folded in front of him.
J. H. Northrop, looking at the camera and smoking a cigarete, while surrounded by notebooks
J. H. St. John Sitting at a table using a microscope. Scattered around him on the table are various glass containers.