On the Construction of a Silvered Glass Telescope Fifteen and a Half Inches in Aperture, and its Use in Celestial Photography is a comprehensive and detailed treatise authored by Howard Grubb, a renowned 19th-century telescope maker and innovator. This book meticulously documents the process of designing, constructing, and utilizing a large silvered glass reflecting telescope, a significant advancement in astronomical instrumentation during the Victorian era. Grubb provides an in-depth account of the technical challenges and solutions involved in creating a telescope with a fifteen and a half inch aperture, including the selection and preparation of materials, the grinding and polishing of the glass mirror, and the delicate process of silvering the glass surface to achieve optimal reflectivity. The narrative extends beyond mere construction, delving into the practical applications of the telescope in the burgeoning field of celestial photography. Grubb discusses the mounting and alignment of the instrument, the mechanical and optical adjustments necessary for precise astronomical observations, and the integration of photographic equipment for capturing detailed images of celestial objects. The book offers valuable insights into the methods of photographing the moon, planets, and star clusters, highlighting the scientific potential of combining large-aperture telescopes with photographic technology. Richly illustrated with diagrams and plates, the work serves as both a technical manual and a historical record of a pivotal period in astronomical research. Grubb’s clear explanations and systematic approach make the book accessible to both amateur astronomers and professional scientists interested in the evolution of telescope design and astrophotography. On the Construction of a Silvered Glass Telescope Fifteen and a Half Inches in Aperture, and its Use in Celestial Photography stands as a testament to the ingenuity and dedication of 19th-century astronomers, offering a fascinating glimpse into the craftsmanship and scientific curiosity that propelled the exploration of the heavens.