394 



DR. J. C. MOTTRAM ON 



same tone as the patterns after thej' have blended. Te-st-fig. 7 shows the 

 patterns used. The following table gives the length of the circumference of 

 the component and the blending distance : — 



or 



The e.\' 

 therefore 

 ] lit tern. 



No. 



(Mean of six observations.) 



porinient shows that the smaller the circumference of the component, and 

 the greater its concentration, the greater the blending distance of the 



