The munitions are transported by rail in the following way. The 75 and 105 shells travel in wooden cases, from which they are removed only to be placed in the supply wagons that carry them directly to the batteries. The shells for the big guns are transported in bulk. They are filled with explosive, but the fulminate is not attached. The powder lots for all sizes travel in _copper cases_, to guard against all risks of accidental explosion. The distributing station sends the ammunition trains to the Main Parks, where they are shunted on to sidings. These trains are afterwards distributed to the advance posts of the Army Parks, where, according to circumstances, they are unloaded to form reserves of munitions, or redistributed to the Army-Corps Parks. Most of the time, when the parks of the front are demanding fresh supplies, those trains are not unloaded at the Army Parks, but sent on to the Army-Corps Parks. There, the ammunition is taken off the cars, and piled in assorted stacks separated by intervals of fifty metres; stacks of cases for the field artillery, stacks of big shells, stacks of fulminate cases, and stacks of powder-bag cases. The Army-Corps Parks are entrusted with the supply of the Divisional Parks, with which they are connected by small railways of 60-centimetre gauge. =3. Divisional parks.= As we have taken the division as a unit and examined its component parts, we shall likewise take the Divisional Park as a type. It has complete autonomy, and has the means of distributing munitions for the artillery and the infantry to the batteries and regiments of the division. It possesses, too, reserve guns, and has the equipment necessary for repairing wheels, wagons, gun-carriages, brakes, motor-cars, etc. Let us examine the part taken by a Divisional Park in the preparation of an action. As it is continually supplied by the Army-Corps Park, its duty is the maintenance of a sufficient reserve for the batteries and regiments of the division. The reserve should be complete when a battle is about to begin. Field artillery and infantry should be supplied with munitions by wagon-trains. In fact, as soon as the soil has been badly ploughed by shells, only horse-drawn vehicles can circulate. The frequent necessity of planting new batteries has been the cause of a considerable reduction in the number of the wagon-trains. They have been replaced by motor-cars that drive as near the batteries as possible. The latter then send their wagons to meet the motor-cars and bring the shells to the points selected by the officer commanding the batteries.