25 



Figure 4« Method of determining the average 

 diameter of a logo 



The importance of measuring diameters correctly is shown in figure 5* Here is 

 a portrayal of the difference which results -when a diameter is measured too 

 High or too low<> 



Measuring the diameter and the length of a log correctly is the most important 

 part of an accurate scaling job e Inexperienced men should be able to do this 

 as correctly as ol4—timers because the measuring is purely mechanical and calls 

 for no special skill or technical knowledge,, Gross scales will agree closely 

 if diameters and lengths are measured carefully e 



