With the continuous increase in human population and its constant demands on the aquatic environment, there has been a compounding of the interrelationships between algae and man. These relatively simple green plants not too long ago were often considered as merely biological curiosities. Within the past twenty-five years, with advances in technology and the increased eutrophication of lakes and streams, the interplay between algae and man has become more complex and more im portant. Problems of taste, odor, toxicity, or obnoxious growth caused by algae are unfortunately quite familiar to the...