This treatise investigates the complex pathologies of urinary and renal diseases. William W. Roberts, a physician likely drawing on extensive clinical experience and medical literature, presents a detailed examination of conditions affecting the kidneys and urinary tract. The work aims to provide a comprehensive understanding of diagnosis, prognosis, and treatment based on the medical knowledge of its time. It likely covers a range of ailments, from common infections to more chronic and systemic renal failures.

As a historical medical text, 'A Practical Treatise on Urinary and Renal Diseases' by William W. Roberts is likely regarded as a foundational work within its field. Its detailed approach to diagnosis and treatment would have been invaluable to practitioners at the time of its publication. While modern medical understanding has advanced significantly, the treatise offers insight into the evolution of urological and nephrological practice. Its value today lies primarily in its historical significance and as a reference for understanding the development of medical knowledge.