In the army of the United States the organization differs in many respects from that of the German army. The infantry companies each consist of 106 men, including officers. Twelve companies form a regiment, and three regiments constitute a brigade. A division is composed of three brigades, and the army corps is made up of three divisions. The number of batteries assigned to the divisions varies, as also the amount of corps artillery. In the army operating in Cuba, the artillery was all in a separate organization, and was distributed to the divisions only on the eve of battle. Experience and theory alike suggest four batteries for each division and eight batteries for the corps artillery. No cavalry is assigned to the divisions, but a regiment is supposed to be assigned to each army corps. The main force of the cavalry is grouped together into cavalry divisions. The cavalry is organized into troops of 100 sabres, four troops forming a squadron, and three squadrons constituting a regiment. Three regiments form a brigade, and three brigades a division. The American cavalry brigade is thus of the same size as a Prussian cavalry division. The cavalry is armed with the sabre, carbine, and revolver. The lance is unknown in the American army. Having viewed the composition of modern armies, let us now see how they are armed. A consideration of the powder now in use is a necessary preface to a description of the weapons employed in the warfare of the present day. The old fine-grained black powder familiar to every boy who has ever handled a shotgun has passed completely out of military use. The powders now employed usually have guncotton or nitroglycerine and guncotton for a base. They are practically smokeless, the product of their combustion is almost entirely gaseous, they leave no solid residuum, and are of the quality known as “slow-burning,” giving a constantly increasing pressure on the projectile from the moment of ignition to the time when it leaves the muzzle of the piece. These powders are manufactured in thin sheets or small tubes or cords, which, for small arms, are broken up into grains. They vary in color from light yellow to black. [Illustration: PRISMATIC POWDER.]