8 



J. F. Kemp— The Storm King Crossing 



relatively larger proportion of fresh water its dissolved salts 

 are generally less, but at the flood the sea-water brought up 

 from New York Bay as a rule raises the percentages materially. 

 The following table is from a series prepared in the chemical 

 laboratory of the Board of Water Supply. They cover a period 

 of four months in 1909. The chlorine is given in parts per 

 million. It is believed to be combined with sodium in largest 

 part, and in smaller part with potassium and magnesium. An 

 analysis that is nearly complete follows the table for chlorine 

 and calcium. It gives an idea of the relative proportions of 

 NaCl, KC1, and MgCl 2 . They are respectively 88, 2 and 10. 

 The total chlorine should be divided in nearly the same ratios, 

 viz. 87*6, 1*6, and 10 # 8. The calcium should be considered to 

 be present as calcium sulphate. 



Partial Analyses of Hudson Eiver Water at Storm King. 



1909 CI 



Sept. 1 1725 



" 4 1068 



" 15 1475 



" 22 1875 



" 29 2525 



Oct. 6 1575 



" 13 2125 



" 20 1900 



" 27 1900 



Nov. 10 2700 



" 17 2095 



Dec. 1 1825 



" 8 2950 



Ca 



Tide 



18-5 



Not recorded. 



46- 





57- 





92" 



Flood. 



83- 



Ebb. 



96- 



Flood. 



82- 



Ebb. 



80' 



Flood. 



98- 



Flood. 



96' 



Quarter-flood. 



106- 



Quarter-ebb. 



158- 



Quarter-ebb. 



The results as a rule show more chlorine at flood than at 

 ebb, but they are not uniform. The maximum value, the very 

 last, is at quarter-ebb. The values give some idea of the 

 ranges of the river water. Roughly calculated into JN'aCl, the 

 chlorine should be increased one and one-half times. 



On Sept. 11, 1909, the following analysis of the river water 

 was made. It is expressed in parts per million. 



NaCl 1 940- 



KC1 47- 



MgCl 2 212- 



MgS0 4 .. 138- » 



CaS0 4 156- 



CaC0 3 .. tr. 



Organic 92* 



Total 2585- 



