U. S, Bureau of Fisheries, 1935 
Bulletin No. 1 7 
FIGURE 7. — BLUESTONING A SEINE. 
At frequent intervals throughout the season a seine is dipped into a solution of copper sulphate to kill the marine growths that 
cause the web to rot. 
Figure 8. — The Scientific Vessel ■•Heron" at anchor in Port Conclusion. 
Note the live box used in tagging operations moored astern. The acquisition of this motor launch in 1932 permitted the carrying 
out of the herring tagging program. 
