A group of five people perform a science experiment on a stage. Four of them stand behind a rolling cart upon which is a metal apparatus connected by tubes to glass flasks. One person stands to the left and pours a liquid into a container on the table. This causes a cloud of white vapor to fill the space between them. To the right of the group is another person kneeling with a microphone, and then rising to stand. The stage is dark and the people are illuminated by a bright light.