U. S. B. F.— Doc. 947. 



Fig. is.— Cotton lines exposed in sea water at Beaufort, N. ('. X, petroleum product No. 2, 

 exposed one month; all the rest exposed four months. S, gilsonite: H, pine and coal tar: 

 G, pine tar: L, Dutch method. All were somewhat fouled. 



Fir,. 19.— Three cotton and two linen lines exposed in sea water at Beaufort, N. C, for four 

 months. F,coal tar on cotton, heavily fouled; Q, copper paint No. Ion cotton and R, 

 copper paint No. 2 on cotton, no fouling; U, copper oleate on linen and W, Dutch method 

 on linen, both somewhat fouled. 



