Seen here are painters atop the Woolworth Building in New York City in 1926. Just looking at this photo makes my stomach churn and palms sweat. How is that guy just standing on that spire like that?

The Woolworth Building at 233 Broadway in Manhattan was designed by architect Cass Gilbert and was completed in 1913. At 241.4 m (792 ft) in height, it remains one of the fifty tallest buildings in the United States, even after a century. Not only that, but it is also one of the oldest skyscrapers in the United States and was designated a National Historic Landmark in 1966. [Source]

A reverse image search on Google and Tineye did not unearth a source for this image. If you know who took this classic photo, please advise in the comments!