Transactions of the American Society of Civil Engineers, Vol. LXX, December 1910: Tests of Creosoted Timber, Paper No. 1168 is a comprehensive technical report that delves into the experimental analysis and performance evaluation of creosoted timber, a material widely used in civil engineering for its durability and resistance to decay. Authored by a committee of distinguished engineers and researchers, this volume presents the findings of a series of rigorous tests conducted to assess the structural integrity, longevity, and effectiveness of timber treated with creosote, a preservative commonly employed to extend the service life of wood used in construction, particularly for railroad ties, bridges, and other infrastructure exposed to harsh environmental conditions. The report meticulously documents the methodologies employed in the testing process, including the selection and preparation of timber specimens, the application of creosote treatment, and the various mechanical and physical tests performed to evaluate properties such as strength, elasticity, absorption, and resistance to biological degradation. Detailed tables, charts, and illustrations accompany the text, providing clear visual representations of the data collected and facilitating a deeper understanding of the results. In addition to presenting empirical data, the paper offers insightful discussions on the implications of the findings for the design, maintenance, and economic viability of timber structures. It addresses the comparative performance of different wood species, the influence of treatment methods, and the long-term benefits of creosoting in extending the functional lifespan of timber components. The authors also consider the practical challenges faced in the field, such as variability in timber quality and the environmental impact of preservative use. This volume serves as an invaluable resource for civil engineers, architects, researchers, and students interested in the science of wood preservation and the advancement of construction materials technology. It reflects the early 20th-century commitment to scientific inquiry and innovation within the engineering profession, offering both historical context and enduring insights relevant to modern infrastructure development.