Podcast:99% Invisible Published On: Thu Sep 20 2012 Description: Pneumatic (adj.): of, or pertaining to, air, gases, or wind. In the world before telephone, radio, and email, the tasks of transmitting information and moving material objects were essentially the same challenge. The way you sent someone a message was … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.