PATTERNS CONSPICUOUS IN NATURE. 



397 



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Experiment No. 9. 



Tlie blending: distance of blaclc and vvliite spotted patterns, as shown in above 

 tigure. The percentage of white to black varied from 10 to 60 per cent. 

 Evperiniental conditions : Candles 1 ft. 6 ins. apart and 2 ft. 6 ins. distant 

 from the pattern, which was placed on a glass plate with a grey background 

 behind, as in experiment no. 8. 



