Artillery-carriages are carried on platform or flat cars. These cars are generally from 28 to 32 feet long by 8 feet wide. When properly loaded, cars of 30 feet will carry two field-guns and two caissons complete. To load them, the carriages are unlimbered and the spare wheels removed from the caisson; the body of a caisson, its stock to the rear, is run to the front end of the car and its stock rested on the floor; another rear train is run forward in like manner until its wheels strike or overlap those of the first, when its stock is rested on the floor. A limber is then placed on the car with its pole to the front, resting on the rear train; the second limber is backed on and its pole held up until a gun, trail foremost, is run under it; the trail of the gun is rested on the floor and the pole of the limber on the gun-carriage. The other gun is run on in the same manner, and its trail rested on the floor under the first gun; a limber is next run on and its pole rested on the last gun; the remaining limber is run on with its pole under the preceding limber. All of the carriages are pushed together as closely as possible and firmly lashed to each other and to the sides of the car; the wheels are chocked by pieces of wood nailed to the floor. When the carriages are liable to chafe each other, they are bound with gunny-sacking or other stuff. A side-platform, such as is found in depots, is the best for loading. The carriages are first run on to a spare car; from this they are crossed over on planks to the one upon which they are to be carried, and arranged on it as already described. When there is no side-platform, the carriages are run up at the end of the car by means of way-planks. Twenty-four thousand pounds is considered a safe load for one car on a good track. Baggage, harness, forage, etc., are usually carried in box-cars. These cars have the same dimensions as heretofore given for those carrying horses. The passenger-car of average size will seat 60 men, but a small car will seat only 50. Allowance must be made for men's equipments, and if the journey is of any distance each man should have a full seat. Then by arranging the seats the men can extend themselves for resting or sleeping. The men must be provided with cooked rations for the whole trip. Each car must be liberally supplied with drinking-water, lights at night, and all other conveniences, to make it unnecessary for the men to leave them during stoppages of the train. The "tourist sleeper" carries 48 men. It is provided with bunks (and some cars with cooking-stoves) and should be used for long journeys when obtainable. Guards should be detailed and so stationed on the train to preserve order both when in motion and during stoppages. The arrangement of the ordinary artillery-train will be: 1. Cars with material necessary for disembarking. 2. Horse-cars. 3. Baggage-cars, loaded with forage, harness, etc. 4. Cars for material. 5. Cars for officers and men.