The practical application of portable wireless outfits to military usage is probably less than four years old, but the portables can transmit messages over a radius of 200 to 250 miles. Expressed in technical terms, the portable stations have a capacity of about 200 mile wave-lengths. The one weakness of the wireless is that the enemy can purloin secrets, though adroitness in manipulation can overcome some of this difficulty. A WORD ABOUT "HEAVY ARTILLERY." It would not do to mention armaments and weapons without a word about the "heavy artillery" of the commissary department, for this branch of the army service is represented by formidable field kitchens, which are again carried on trucks or motor cars. The officers' field kitchen follows the advance of the officers to the field of action. Some of these kitchens, particularly those of the Kaiser and the Crown Prince in the German army, are described as almost luxurious. They contain complete equipment--range, bake-oven, pantry, ice-box, china closet and every device needed for preparing a complete meal. Supplies are hurried after the troops in motor trucks from stations where the supplies are delivered by rail and soups and sturdy meals are prepared which were lacking in the campaigns through which the soldiers of the Civil War passed. The pioneer mobile military field kitchen which has been the subject of widespread comment was developed by the German army. It consists of a four-wheeled vehicle drawn by two horses, though motors have supplanted the horses in some cases. The front carriage is detachable from the rear and is actually a separate contrivance. On the rear truck is a 200-quart copper, double, or jacketed vat. Also a 70-quart coffee tank. Both receptacles have separate fireboxes and ash pits. One section carries extra rations for the men, the daily quota of provisions, extra rations for horses, folding canvas water pails and utensils. The actual food is cooked within the vat or caldron inside the water jacket, so that the heat does not come in contact with the food direct, thus preventing burning. The food will cook slowly for hours when once the water is heated, and will remain hot for a long time. The men can get water in an emergency and hot coffee is always ready for the sentries and men on guard duty to carry with them at night. Of course a bottle of the thermos type is used by these men so that they can have hot coffee when on the line of duty. The kitchen outfits are complete and so arranged that they can be rushed over rough ground without spilling their contents.