This volume covers the chemical technology of those substances that alphabetically fall between the polyols and rutin. Of primary interest to the physician are sections on the polysaccharides, proteins and protein hydrolysates, pyridoxine and other vitamin B6 compounds, quaternary ammonium compounds, radiography, and riboflavin. As in the preceding volumes, this one contains much information on technical subjects other than those related to medicine. Many chemicals, potentiometry, powder metallurgy, power generation, pressure measurement and technique, printing, printing ink and reproducing processes, synthetic protein fibers and protein plastics, pulp, military and commercial pyrotechnics, radioactive elements and radiochemistry, rayon, refrigeration, acetylene chemistry, resins, rocket propellants, rosin and its derivatives, rubber (synthetic and natural), and rubber compounding are discussed. This is a valuable, reliable, and informative encyclopedia.