The present book forms Part II of The Elements of Statics and Dynamics, of which Part I, (statics) has already been published. It aims at being useful for Schools and the less advanced students of Colleges; the examples are, in consequence, large in number, and generally of a numerical and easy character. Except in two articles and a few examples at the end of the Chapter on Projectiles, it is only presumed that the student has a knowledge of Elementary Geometry and Algebra, and of the Elements of Trigonometry. It is suggested that, on a first reading of the subjects, all articles marked with an asterisk should be omitted. Part I, and Part II, are, as far as is possible, independent of one another; hence, any teacher, who wishes his pupils to commence with Dynamics, may take Part II. Before Part I, by mistakes, or hints for improvement will be gratefully received