Who are these guys? Academics, maybe. They have that studious look, and college academics to boot. Women have been teaching in elementary and high schools since the 19th century, but all-male faculties? Considering this photo looks like it's from the thirties or forties, an all-male faculty screams university. But then again, maybe these are businessmen of some kind. The writing on the blackboard is difficult to make out, but the word "plant" can be read, and a few dollar signs as well.
