In the two last-named classes of work dogs can pass swiftly backwards and forwards through brisk firing and run much less risk than a man. IV--DOGS ARE HEROES UNDER FIRE There are several societies in Paris which choose suitable dogs in order to make soldiers of them. The "Central Society for the Development of the Breeds of Dogs" gave three thousand dogs to the French army last August. After they have been tested, an operation which takes about three weeks, they are sent to special stations in the rear of the armies to be trained, and five or six days are all that are necessary for the training of animals for the simpler kinds of work. For more difficult tasks the training is naturally a longer business. When dogs are to be trained as communication agents the instruction may take several weeks. They are taught to go from one master to another, first by a call, then by a whistle, then simply at a mere gesture. Distances are gradually increased, obstacles are placed in the way, the animal's goal becomes invisible, and so on. Much patience is required in this kind of work; and it is found that the best results are obtained by kindness and giving rewards for good work accomplished. The animals are taught to recognize only two masters, and to obey them alone. Outsiders are not allowed to pet or feed them. When they understand that they have to obey only one or two men, they have to learn to follow one or both of them when marching in a column of infantry, to recognize them when in a group, and so on. They are taught to endure the sound of gun-firing or explosions quite close to them. Above all, they are strictly trained never to pick up articles on their journey and to refuse delicacies offered them by strangers. Specially-trained dogs only are chosen for this work, and they are mostly sheep-dogs or collies or animals whose business it was in civil life to be guardians or watchers, and always on the alert. These are all the easier to train for the special work--somewhat of the same order--which they are set to do in war.