The physical properties of water and steam have been the subject of lhorough investigation for a long time. It can, on the one hand, be due to the important role of this substance in the processes that take place in nature and, on the .other hand, due to its wide industrial use. Steam is the most important working substance used in conventional and nuc- lear power plants, in chemical engineering and other fields of industry. The variety of practical use of water and steam generates a need for knowing their thermodynamic, transport, electrical, and other properties over a -very wide range of...