The original 1957 article referred to is available beginning at [1], with the drawing on the following page; the specific paragraph about pneumatic tubes is on p206 [2].

And two paragraphs later:

  Contents of the world's greatest libraries and schools will be
  available to anyone over special television services. From an
  armchair, it will be possible to call for any information by
  coded request.

[1] http://books.google.com/books?id=JuEDAAAAMBAJ&pg=PA100 [2] http://books.google.com/books?id=JuEDAAAAMBAJ&pg=PA260