Photography is today one of the most powerful known means of communication. It is, above all else, a descriptive medium, one which in a single picture can give certain kinds of description in a way that is wholly beyond the power of words. Ease of description in fact is not only photography’s greatest asset; it is also its own worst enemy. Because photographs carry such tremendous conviction, produce such a feeling that one was present when they were made, it is difficult even for the expert to bear in mind that they seldom look much alike the things photographed.