Formation and Properties of Boiler Scale by Everett P. Partridge provides a comprehensive review, up to 1930, of the formation, composition, and impact of scale in steam boilers. The book is divided into four main parts: Part I discusses the thermal effects of boiler scale, including its heat conductivity and the implications for heat utilization and boiler metal temperature. Part II examines the chemical and crystallographic constituents of scale, their solubilities in water, and solubility equilibria in boiler water. Part III elaborates on the mechanisms and rates of scale formation. Finally, Part IV discusses various methods for scale prevention, both external and internal, including water conditioning, ion replacement, and chemical treatments. With extensive experimental data, theoretical analysis, and practical recommendations, this bulletin serves as a fundamental reference for engineers and researchers dealing with boiler scale issues.