people
Tracy is standing outdoors, facing the camera with his left arm at his side and holding a pipe in his right hand.
Jennings is standing in front of a line of bushes, arms at his sides, looking toward the left frame of the photograph. There are two buildings visible in the background, behind the bushes.
Young is seated at a table facing toward the camera. He is wearing a white shirt and tie and the back of the room is obscured by a canvas hanging.
Dellinger is sitting at this lab bench with his hand placed next to a microscope.
Nonidez is sitting next to a lab bench. His right hand is placed on the lab bench, next to a microscope.
Lusk is sitting in a chair in front of some book shelves full of books.
I. P. Pavlov and W. T. Pavlov are standing next to each other in front of a building.
Pavlov is standing in front of a building with his arms folded.
I. P. Pavlov and Jacques Loeb are standing in a circle with another man talking in front of a building.
Child is working at his lab bench next to a microscope.
Harold Tupper Mead sitting at a table with a microscope. Behind him is a large glass case filled with various plants and a map can be seen on the wall.
Harvey is facing the camera but looking down into a mall glass container held in his right hand. He is behind a table covered in lab equipment. There are pipes and a faucet against the far wall.