GEOMETRY FOR SELF-INSTRUCTION, AND MAKING THE STUDY EASY, WITH 218 FIGURES, MOSTLY NEW. GIVING WITH MUCH OTHER ORIGINAL MATTER Α RANGE FINDER, ΤΟ 4,000 YARDS FOR FIELD ARTILLERY, AND TO UPWARDS OF 6 MILES FOR COAST DEFENCE. BY ROLLA ROUSE, LATE MAJOR 2nd BAT. 22nd R. v. J.P. AND D.L. FOR SUFFOLK, Author of "The Practical Man," "Practical Geometry, British Infantry 39 66 PUBLISHED BY W. MAXWELL & SON, 29, FLEET STREET, BOUVIER-LAPIERRE. Cours de Géométrie Elementaire a l'usage de la Section des Sciences. Traité de Géométrie Elementaire con- ROUCHE et VINOT. LAPLAINE. Récréations Mathematiques. 3fr. Géométrie simplifiée et appliquée a l'art * The work by Tacquet gives all the information in Euclid but The French works may be purchased of Messrs. Asher and Co., 13, iv Aide memoire de l'officier d'Etat-Major. 5fr. Aide memoire portatif a l'usage des officiers du Génie. 12fr. Geometry, or a sequel to Euclid. Translation from German, by Ross. Practice of Geometry. 1672. Young Mathematician's Guide. 1713. HAWNEY. "Compleat Measurer." 1721. For parts as to RANGE FINDER, see pages 254 to 259, 283 and Table in 284, also Fig. 8 in plate H. INTRODUCTION. THIS work, as completed, is intended for self-instruction in Geometry; a subject to me, for more than fifty years, of the greatest interest, as combining valuable practical knowledge with continued opportunities for exercising the reasoning powers. It is especially suited for the use, and I trust the pleasure, of a most valuable class of men, the non-commissioned officers of the British army. It is also fitted for a still more valuable class, "the ladies," geometry being a study in which "woman's wit is better than man's wisdom,”—rapidity of perception and ingenuity in application being of so great importance in all the most interesting demonstrations, that I believe a woman might learn more from this work in one week than the average of men would learn in four. Originally I commenced the work as a mere instructional work on plane geometry, under the impression that on a subject in which I felt great pleasure a work might be prepared which might be made interesting, even to schoolboys. However, during the progress of the work, I became con |