Here's Why

Pneumatic tube

Pneumatic tube


Originally uploaded by iwoolf.

My local supermarket uses a pneumatic tube system for moving cash and documents around the shop. This is one of the canisters that whizzes around the store, like something out of The Shadow.

About the author: Ian Woolf lives in Sydney, has a degree in Applied Science, worked as a solar astronomer, software engineer, systems programmer, webmaster, research assistant, Cisco CCNA tutor, Physics laboratory demonstrator, Computational Theory lecturer, and subject coordinator; while changing his career to freelance writing and broadcasting. Listen to Ian on the Diffusion radio science show on radio 2SER 107.3FM Monday at 6:30pm in Sydney or streaming audio on www.2ser.com, or listen to the Diffusion podcasts. You should follow me on twitter, here