(YouTube link)
Printing a book was different in 1947. The process required quite a few skilled workers performing tasks you won't see anymore, outside of historical videos like this. Contrast this process with a more modern method of publishing. -via Metafilter
@Roy L- thanks for taking the time to submit that comment from someone who actually worked with this kind of press. I have family in Crawfordsville, so I find that comment all the more interesting! Thanks for the post. :)
In 1964 when I started in the business, Crawdfordsville was in the process of switching over from hot metal composition and flat bed presses to the "new" offset perfecting presses so I remember the equipment shown in the video. In fact Encyclopedia Britannica was involved in the creation of this video and RRD produced their books . I believe this video was filmed in the old Sloan street plant in Crawfordsville, Indiana.
You dont realize it when you buy a book in a big company book seller, but the only time human hands may even touch the book itself is packing it in the box for shipping.