MAPS AND RECORDS. lOI 



be rapidly made with a writing-pen. The points that 

 should be aimed at in this letter should be plainness, 

 neatness, and such variety as will give a general air of 

 finish to the work. Not very much time can profitably 

 be given to this part of a working map, so that neat- 

 ness and despatch in making it will be found of great 

 advantage to the young engineer. The finished map 

 should receive more careful attention in the execution 

 of letters, particular attention being given to the adap- 

 tion of the style of the letter to the importance of the 

 thing for which it stands. Simple letters are best for 

 drainage maps, as well as the most easily made. They 

 should be lightly pencilled in until a design is found 

 which is adapted to the map, after which they should 

 be inked in. The letters should be the last part of 

 the map to be finished and should be so placed as not 

 to obscure figures which accompany lines. 



Copying Maps. 



It is sometimes desirable to make one or more copies 

 of a map, either for use in the construction of the 

 work or for preservation with the field notes. This is 

 most conveniently done upon tracing-cloth or vellum. 

 Stretch the cloth over the map and draw in the lines 

 by letting the pen follow directly over the lines on the 

 •map. Instead of the tracing-cloth, a thin quality of 

 vbond paper may be used. This, however, is not so 

 transparent as the cloth and hence requires^ a strong 

 light in order that the Hnes may be readily traced. 



Where several dupHcates are required, what is known 

 as blue prints can be made more cheaply than hand 



