pneumatic wanderings

Last week I was in Tasmania, and spent some time searching the Internet with my mum for pneumatic tube discoveries. She remembered a department store in Montreal called Holt Renfrew that had a wonderful pneumatic tube system, visibly crisscrossing the walls and ceiling of the store. We found out that these systems are also called cash railways or cash carriers. I've noticed a cash carrier in my local Coles supermarket, still used to transport wads of banknotes. I wonder where else these cash carrying networks lie in Melbourne? How do they relate to the systems used in hospitals?

Image via the Ephemera Society.