National Geographic : 1974 Oct
the Golden Gate on infrared film (second from left). Sediments discolor the bay in a natural color photograph (left center). Finest detail re sults from black-and-white filtered by red (right center)-a cartographer's delight. Another ex- perimental infrared film (second from right) contrasts sharply with color infrared (far right), in which lush vegetation appears red, water and areas of thin vegetation are brilliant blue, and terrain contours show up with particular clarity.