Pneumatic tubes were used to deliver mail!
Pneumatic tubes were used to deliver mail!
You can read more about the fascinating history here: https://about.usps.com/who-we-are/postal-history/pneumatic-tubes.pdf
Credit: https://hachyderm.io/@miah
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More steampunk than solarpunk, but yeah always interesting to read some details about complex but mostly forgotten technology.
In the medicine field this technology isn't uncommon because you can send samples quickly to the hospital laboratory.
Imagine upping the size, running the vacuums on renewables and automating it though. You could distribute farm fresh veggies to the doorstep of everyone in an entire city. I think that'd be solarpunk as hell.
What about this is "punk"? It's just old technology. I don't see a reason to give everything a "punk" label.