By these devices a fire is quickly and accurately located. When the lookout man sees a fire, he gets its bearing from the map by means of the sighting device. He telephones this bearing to the Ranger, or, in many cases, to the Supervisor. Immediately the Supervisor goes to his map, picks up the black thread attached to this lookout point, stretches the string, and, having marked off the bearing, pushes the thumb tack into the map. In the meantime, another lookout, perhaps two more, have sighted the same fire. The black threads from the other lookout points on the Supervisor's map are stretched and fixed in a similar manner. The fire will be found to be at the point where two or more of these black threads intersect. This is only one of the many ways which have been devised to locate forest fires; there are other methods, but all are based upon the same principle. [Illustration: Figure 42. A forest fire running in dense underbrush on one of the National Forests in Oregon.] [Illustration: Figure 43. Men in a dense forest with heavy undergrowth clearing away brush to stop the fire as it is running down hill. Crater National Forest, Oregon.] _The Fire Fighting Organization._ The organization of men who do the actual fire suppression must be an elastic one, adequate to meet the needs of a Ranger district or of a whole National Forest, or, in some cases, of an entire administrative district, comprising as many as 25 to 30 National Forests. The Forest Guards and Forest Rangers are known as the first line of defense in this war against forest fires. Upon them falls the brunt of the work of fire suppression. The second line is composed of local stockmen, ranchers, and logging and sawmill crews. When these prove insufficient in number, the large villages and towns are called upon, and the last resort is the labor of the cities and the United States Army. Thus, in the case of a very large fire the organization of the Forest Service is modified to cover not only each and every National Forest, but also entire States. In case of a very large fire, every available man from each Forest is sent to take his place in the organization. Expert fire fighters are sent direct to the fire. Other Forest officers are sent to the large towns and villages to act as quartermasters. These men hire fire fighters, entrain them, and fill orders for food, bedding, tools, and other equipment. Other quartermasters at the scene of the fire check shipments of supplies, check the time of fire fighters, approve accounts, hire transportation, and perform similar duties. Special disbursing agents are sent to the scene to pay the men. In short, everything is done to dispatch as quickly as possible the necessary men, food and equipment to the fire, and to do it in accordance with the prearranged plan for such emergencies.