ON ANCIENT ENGINES OF WAR. 39 THE SLING. 43 THE BOW. 44 MERITS OF THE LONG BOW. 45 Our Forefathers encouraged to acquire skill in archery by legal enactments, and by the founders of our public schools. 47 1ST. BY LEGAL ENACTMENTS. 47 2ND.—BY THE FOUNDERS OF OUR PUBLIC SCHOOLS. 48 MEANS BY WHICH SKILL IN ARCHERY WAS ACQUIRED. 49 PROOFS OF THE IMPORTANCE OF ARCHERY. 52 MILITARY AND POLITICAL CONSEQUENCES OF SKILL IN THE USE OF THE BOW. 53 THE ARBALEST, OR CROSS-BOW. 54 DESCRIPTION OF CROSS-BOW. 57 COMPARATIVE MERITS OF THE LONG AND CROSS BOW. 59 COMPARATIVE MERITS BETWEEN BOWS AND EARLY FIRE-ARMS. 59 HISTORY OF ARTILLERY. 62 ETYMOLOGIES. 72 HISTORY OF PORTABLE FIRE-ARMS. 73 THE BAYONET. 83 ACCOUTREMENTS AND AMMUNITION. 84 HISTORY OF THE RIFLE. 86 RIFLED BREECH-LOADERS. 92 ON RIFLING. 95 ON THE NUMBER, FORM &c., &c., &c., OF THE GROOVES. 96 ON RIFLE PROJECTILES. 101 CONCLUSION. 108 THEORETICAL PRINCIPLES. 110 DEFINITIONS. 110 MOTION OF A PROJECTILE. 111 GRAVITY. 113 ON THE TIME TAKEN TO DRAW A BALL TO THE GROUND BY THE FORCE OF GRAVITY. 114 ATMOSPHERE. 115 RESULT OF THE AIR’S RESISTANCE. 115 EXPERIMENTS IN FRANCE. 116 ON THE EFFECT OF THE RESISTANCE OF THE AIR UPON THE MOTION OF A PROJECTILE. 117 ON THE RESISTANCE OF A FLUID TO A BODY IN MOTION. 117 ON THE VELOCITY WITH WHICH AIR WILL RUSH INTO A VACUUM. 118