Bull. U. S. B. F., 1927, Pt. II. (Doc. 1031.) 



Fig. 36.— Relation between color and fouling, as judged by numbers of barnacles and Bryozoa that attached on colored 

 tiles. A, unglazed tiles submerged for one week (July 28 to August 3) at Beaufort, N. C. B, another series of 

 unglazed tiles (black, red, white, and green) exposed for 8 days. C and D, white and black unglazed tiles exposed 

 for 1 month, showing relative amounts of fouling due to Bryozoa (bugula) 



