Philadelphia, United States of America.
Introductory intertitle reads: "Here's the newest of scientific inventions - a machine which has saved many lives by breathing for its patients!"
An artificial lung is demonstrated. Earl Potter (?) is the patient we see being wheeled into the artificial lung. Various shots of dials and indicators. Earl is asked how he likes "living in a machine". Can't catch his response, might be something about not having to get up early in the morning.