The author outlines the type, characteristics of coagulant popularly used; especialy discusses the application conditions and extents of polyacrylamide, polyiron sulfate and poly alum.

介绍了目前应用的的种、性质,较详尽的论述了丙烯酰胺、合铁和合铝分子化合物的使用条件和应用范围。