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University of California Publications in Agricultural Sciences [A^ol. 1 



TABLE III 



Effect of Second Addition of NaCl ox TniE Required to Clear 



Suspensions of NaCl+ H^O Soil and H2O Soil 



The results of this experiment seemed of sufficient interest 

 to warrant a repetition of the work on a larger scale. Accordingly 

 the following experiment was prepared, much in the same manner 

 as the above, but using 25 grams of soil, 250 cc. of solution, and 

 250 cc. graduates, instead of test tubes. In this case the weight 

 of the suspended matter was also deterinined after the mixtures 

 had stood undisturbed for three days. A photograph of this 

 series taken two days after the final shaking is shown (Figure 3). 



Fig. 3. A Photograph of the Suspensions Described in Table IV 

 The graduates containing the suspensions as shown in Figure 3 cor- 

 respond, from left to right, to the Nos. 1 to 12, inclusive, of Table IV. 



