Video provided on YouTube by Digital Transitions.
From the Description:
An inside look into the New York Public Library’s project to digitize their collection of slides by Dance Critic, Novelist, Journalist, and Photographer Carl Van Vechten. His preoccupation with the dance performers of his day lead him to capture thousands of unique and colorful images. This video takes a look into the process of digitizing over 800 of these slides using the highest-quality digitization equipment available.
See Also: Jerome Robbins Dance Division (NYPL)