SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Pneumatic object transportion system. Historical artwork of men examining storage tanks (green) of the air reservoir of a pneumatic capsule pipeline (PCP). Air from the tanks is used to propel objects along the PCP. This technology has been used since the 19th century for transporting mail, cash receipts and numerous other products. Taken from L'Illustration Journal Universel, 1873.
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