First photograph of the curve of the horizon

On November 11, 1935 Albert W. Stevens took a specially designed infrared camera to a height of 72,395 feet over South Dakota. Albert took the first photograph of the left to right curvature of the earth. This was published in the May 1936 issue of National Geographic. A 35″x17″ insert was included in the issue. I purchased a copy of the magazine and the fold out. A high-resolution scan of the insert is included below.

Download full resolution PDF: 1935 SDakota