"The Gunner's Examiner" by Harold E. Cloke is a scientific publication written in the early 20th century. The book serves as a comprehensive guide for enlisted personnel in the Coast Artillery Corps, specifically focusing on preparing them for examinations as first- and second-class gunners. It compiles technical information and practical knowledge necessary for understanding gunnery operations and qualifying for artillery exams. The opening of "The Gunner's Examiner" provides a preface that explains the author's motivation for compiling the text, emphasizing the challenges faced by students of gunnery in accessing important information and comprehending the often technical language found in existing materials. In this section, Cloke outlines his intentions to simplify and clarify the examination requirements established by the War Department, including the subjects covered and the structure of the qualifications. The content suggests that the text will be continuously revised to keep pace with the evolving art of gunnery, underscoring its practical application for military education and training. (This is an automatically generated summary.)