At the End of the Rainbow, Part 1 (1946)
Channel: Maria Popova
Date: 05/03/2012

Vintage film promoting ultraviolet light -- its history, physics, and health-giving properties. Background and context: http://www.brainpickings.org/index.php/2012/03/05/at-the-end-of-the-rainbow

Public domain footage courtesy of the Prelinger Archives: http://www.archive.org/details/AttheEnd1946