30 



FISH AND GAME COMMISSION" 



Figure 9. Tagging- salmon at tlie Division's temporary fish 

 trap on the American River near Sacramento. Photograph by Richard 

 S. Croker. 



During the period from May 11 to June 15, 1916, a total of 116 

 spring run fish were tagged in the vicinity of Martinez, and of these 33 

 were recovered. More tagging will be done in this area during the fall 

 run. This tagging is part of a program to determine the time at which 

 runs bound for the various rivers pass through the Delta fishing area. 



Pollution — Tuolumne River : For years the industrial pollution of 

 the Tuolumne River at the City of Llodesto has been getting worse. The 

 city does not have an industrial waste disposal system and has permitted 

 industries to dump into the river via the storm sewers. Plans for stopping 

 this illegal action came to nothing when the war made it impossible to 

 obtain waste disposal machinery, and when it was essential to keep all 

 food processing factories operating at fuU capacity. 



