THE THEORY AND PRACTICE OF WORKING PLANS 149 



fire-guard stations, location of fire-fighting tools, and places 

 whence assistance in fighting fire may be obtained. The base 

 should be maps i and 3 combined. 



(11) Permanent improvement map, to accompany the per- 

 manent improvement plan showing all improvements, existing 

 or proposed, such as ranger stations, fire cabins, telephone 

 lines, etc. 



(12) Grazing map, to accompany the grazing plan showing 

 the grazing types, condition of the range, the portions grazed 

 (and by what class of stock) or ungrazed, the winter, summei, 

 or year-long range, corrals, pastures, drift fences, water tanks, 

 etc. 



Lest too many data be placed on one map, it is better to 

 have separate maps than to combine too much and cause con- 

 fusion. For ordinary purposes, however, the following maps 

 may well be combined : 



Nos. I, 2, 3, and 4. Topography, boundaries, types, age- 

 classes.* 



Nos. I, 2, 3, 7, and 8. Topography, boundaries, types, 

 reproduction, cutting. 



Nos. I, 2, 3, and 9. Topography, boundaries, t>'pes, plant- 

 ing. 



Various methods of regulating the cut require special data 

 on the map, e.g., if the regulation is to be by area reduced accord- 

 ing to site classes (method No. i, variation II; method No. 14, 

 variation II; method No. 16, variation II, also method No. 17, 

 Nos. I and III), then a site-class map (No. 5) is necessary. 



Detailed maps of survey units or of small areas which it is 

 desired to show in greater detail should be placed in the appen- 

 dix, as should also special maps showing areas of insect or 

 fungus attacks, etc. 



(f) Forest Description.— jMust be concise and free from 

 burdensome details. Silvical details, methods and costs of 

 logging and milling, etc., had better be" placed in the appendix 



* If even-aged or appro.Kimately SO. 



