Photograph of a man making adjustments to an unidentified machine, [s.d.]. A large metal machine can be seen at center. An electric motor is attached to the back of the machine at left, while several gauges and meters can be seen on the front of the machine at center. The man, who is wearing a dark suit, stands at right and is manipulating a series of bottles attached upside down to the side of the machine. Several power cables can be seen running out of the bottom of the machine at left, and two windows are visible in the background.