Postcard from Germany!

Today I got a nice postcard from Germany! The postcard shows a Dräger Pulmotor in action during 1907. It was the first artificial respiration device that could deliver gas at a specified volume. They were commonly used for drowning, smoke inhalation, and mining disasters and were in use up to the 1940's. However, it had several limitations like its failure to detect airway obstruction and its relatively long set-up time. The card was sent by my dad who visited Germany. Thanks Dad!