Taylor and Wells. — Preservation of Nets and Lines. 47 



MONrHSLilP_P&CD 



Fig. 5. — Tensile strength of cotton lines exposed to sea water at 

 Beaufort, N. C. 



combined with a toxic copper ingredient. The tars (F, G, H) 

 show a rise and then a steady diminution in strengfth. The cop- 

 per oleates, though showing the usual initial diminution of 

 strength nevertheless hold up well during the period of expo- 

 sure. The Dutch method (L) here again shows characteristics 

 that make it difficult to combine with any of the groups. Bull's 

 method, Petroleum Product Nos. 1 and 2, and Gilsonite, show no 

 preservative action worth considering, as far as tensile strength 

 is concerned. 



