I picked up a dvd of Disney's "Tomorrowland" which contains 5 or 6 one
hour science tv shows from the 1950s. Wernher von Braun appears in a
couple describing how man would one day go to the moon. The shows are
surprisingly well done. It was probably at the director's urging, but
for a few minutes von Braun was uses a bamboo slide rule as a pointer to
indicate which part of the model goes along with his narrative.

Mike Markowski