You don't really see them around anymore, but back in the early-20th century, pneumatic tubes were more popular than polio and the Charleston combined. Basically, they're pipes that use compressed air or a vacuum to transport small packages over short distances, like letters and memos in old-timey office buildings, or human flesh in new-timey hospitals. Lisa explains:
"In my hospital, the specimen's journey started in the operating room, where one of the nurses would pack it up in a specimen container. There are various sizes, ranging from about the size of a small prescription bottle (for skin biopsies) to containers shaped like cookie tins for kidneys, partial foot amputations, big ol' sections of bowel, etc."
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Or you can use a hand to play the most horrifying game of tag imaginable.
"The nurses would put the container in a biohazard bag," Lisa continues, "then slip the paperwork into a sleeve on the outside of the bag, and put a bunch of specimens into a pneumatic tube capsule. ... Then you go to the tube station, which is just a hole in the wall with padding where the capsules land, and push a bunch of buttons to tell it where you want it to go." Which means that whenever you're in a hospital, there might be containers full of Cannibal's Delight whizzing by just inches away from you inside the building's walls.