72 INSTRUCTIONS FOR MAKING FOREST SURVEYS, E1C. 



An atlas sheet or any other map should show plainly 

 the information it is intended to convey, and artistic 

 flourishes, fancy type, or border designs are useless. 

 It should show what it is, where it is, the scale, who 

 made it, and the date. It should show also by whom 

 the field examination or survey was made and the date 

 of the same. If it is from an original survey the mag- 

 netic variation should be given. On the borders of the 

 map, if the area shown covers more than one township, 

 the township and range numbers should be given, and 

 also, if possible, one or more meridians and parallels. 

 If a degree meridian does not fall in the map, then 

 some intermediate may be given, such as 10' or 20 '. 

 Table 7 will be found convenient. 



TABLE 7. Lengths of degrees on meridians and parallels at different 

 latitudes on the earth. 



