253 



Fourth, 

 when 46.92 

 water. 



-The number of grams to separate the disk from the solutions 

 . of each of the three materials were dissolved in 200 cc. of 



Trial. 



Sodium 

 Chloride. 



Copper 

 Sulphate. 



Sugar. 



1 

 2 

 3 



50.00 

 50.02 

 50.01 



51 .00 

 51.05 

 51.07 



53.10 

 53.10 

 53.50 



Mean . 



50.01 



51.06 



53.26 



Fifth. — The number of grams to separate the disk from the solutions 

 when 62.56 g. of each of the three materials were dissolved in 200 cc. of 

 water. 



Trial. 



Sodium 

 Chloride. 



Copper 

 Sulphate. 



Sugar. 



1 

 2 

 3 



50.90 

 50.85 

 51.05 



51.50 



51.45 

 51.25 



55.70 

 55.80 

 55.75 



Mean. 



50.90 



51.46 



55.75 



Note. The copper sulphate solution was a saturated solution. 



Sixth. — The number of grams to separate the disk from the solutions 

 when each of the three materials were saturated solutions at the normal 

 temperature. 



Trial. 



Sodium 

 Chloride. 



Copper 

 Sulphate. 



Sugar. 



1 



50.92 

 51.05 

 50.90 





57.00 



2 





56. 95 



3 





57.10 









Mean. 



50.96 



51.46 



56.99 



These results for each of the three dissolved salts may be plotted 

 graphically by using the number of grams concentration as abscissas and 

 grams to separate the disk as ordinates. 



