from the West Coast to the East, they are patrolling with sentries and military police. It has been demonstrated t-hat one man. accompanied by a sentinel dog. can replace six sentries. The perfect sentinel dog is trained not to bark or growl alouj* at suspicious noises or smells; master will be warned when, by touching the dog's back, he feels hackles rise and the vibration of an inaudible growl.Medical Corps dogs are credited with saving thousands of lives in the last war, and in this one, too— especially in Russia. There, during last winter's campaign, the wounded had to be located quickly, else they froze to death.Communication dogs will carry messages between two masters, delivering to no other. Small and fast, they are difficult targets; and while a canine courier may be captured and his message discovered, he can^j be made to talk? sjDogs equipped with reels can lay half a mile of wire in five minutes.The fact that the U. S. Army, thanks to the progressiveness ofMaJ. Gen. Edmund B. Gregory, Quartermaster General, has recognized the military virtues of man’s best friend in opening the eyes of civilian defense authorities to the value of dogs. Here the most outstanding work to date is being done in Boston, where Fire Commissioner William A. Reilley has been working with the Kennel Club there in training Dalmatians for work with the Fire Department. These familiar “coach dogs” climb ladders, through fire and smoke to find rmf y) caught in fallen debris.There still remains a much wider field for dogs in civil defense, on such jobs as guarding waterworks, railroad junctions, vital bridges.• • •