The left image is, amazingly, a daytime shot - the sun is visible in the top-left corner. The smog was so bad on that day ("Black Tuesday", November 1939) that a camera essentially could not capture any detail _in broad daylight_.
The left image is, amazingly, a daytime shot - the sun is visible in the top-left corner. The smog was so bad on that day ("Black Tuesday", November 1939) that a camera essentially could not capture any detail _in broad daylight_.