HEAD MASTER OF THE OXFORD MILITARY COLLEGE; LATE INCUMBENT OF PREFACE. THIS book is chiefly an expansion of a syllabus on the subject drawn up for the use of the Cadets of the Royal Military Academy, by Professor CROFTON, F.R.S. ; and on this syllabus the author based his lectures, the substance of which is here printed. When called away very unexpectedly to the Oxford Military College, it seemed to him undesirable that the labour expended, and the experience acquired, in organising this course should be lost; and consequently this little volume was, under pressure of many other engagements, drawn up so as to be ready for use at the commencement of the following term. Although the subject is treated specially with reference to the studies at the Royal Military Academy, still the book may be found more generally useful; and the author has accordingly resolved to publish it. A very brief geometrical treatment of the properties of the Parabola, Ellipse, and Hyperbola has been added; so that a short course of Geometrical Conics may be |