Smith — Determination of CMorine in Natural Waters. 3G5 



Some Vv'-ork has been done along this line at this laboratory al- 

 ready and items are added as opportunity Jpresents itself; it is 

 no easy matter, lio^vever, to secure samples above suspicion and 

 therefore the work is slow, as the expense of securing these sam- 

 ples is quite an item. In the determination of these normals 

 we have encountered the very difficulties alluded to above, and 

 the low chlorine content of most of our Wisconsin true inland 

 waters requires the selection of the method promising the great- 

 est exactness in results. So far as our experience goes the 

 method given is the most satisfactory yet proved and is pre- 

 sented here for vour consideration. The ^\Titer has drauTi 

 freely on all available data, written or unwritten, and gives this 

 as a method, modified and developed, which he has found invalu- 

 able in his owTL laboratory experiences. 



Beloitj Wisconsin, . i ; .' 



