The image is a black and white photograph of two men sitting next to each other in a laboratory. The man on the left is wearing a suit and glasses and is holding a pipe in his hand. He is sitting on a chair with his legs crossed and is looking at the camera. On the right side of the image, there is a large metal cylinder with a valve on top. The cylinder appears to be an oxygen tank. In the background, there are various scientific equipment and tools hanging on the wall. The photograph is accompanied by text that reads "Capacity in compressor and practice chamber developed by David Smith (right) and others, August 1990."