WATER ANALYSES 



27 



the water at the lowest pumping station (number 1) is brackish to the 

 taste, but shows no deterioration at the middle (number 2) and upper 

 (number 3) stations, a half a mile and a mile farther inland. Mr J. B. 

 Atherton, president of the Ewa Sugar Company, has kindly furnished 

 me with a few analyses of the water from those and of two other wells 

 as near to the sea as number 1, which are given herewith. 



Analyses of Water from Ewa Plantation 



Total solids 



Silica (SiOo) 



Iron and alumina... < . fv; 3 r 



Lime (CaO) 



Magnesia (MgO) 



Soda(Na 2 0) 



Potash (K 2 0) 



Chlorine (C1. 2 ) 



Sulphuric acid (S0 3 ) 



Phosphoric acid (P 2 5 ) 



Pump 

 number 1. 



1891, 

 May 5 



Grains 

 per gallon. 



41.45 

 4 49 



5.92 



2.41 



10.28 



17.fil 

 1.89 



Pump 

 number 2. 



1891, 

 July 25 



Grains 

 per gallon. 



20.11 

 4.89 



1.51 

 1.96 



3 87 



8.18 

 1.20 



Pump 



number 3. 



1897, 

 August 



Grains 

 per gallon. 



35.741 

 4.351 



409 



2.88 

 3. S3 

 8.71 



11.97 

 2.44 



Pump 

 number 5. 



1897, 

 December 7. 



Grains 

 per gallon. 



42.4 

 5.0 



0.3 



3.0 

 3.6 

 5.7 

 0.G 

 12.4 

 1.9 

 0.CJ 



Mill. 



1897, 

 December 



Grains 



per gallon. 



69.6 

 4.9 



0.3 



20.0 

 2.0 



28.7 

 2.5 

 0.06 



The composition of the fresh waters of the islands has been very care- 

 fully determined by Dr Walter Maxwell* as follows: 



Per cent. 



Silica 0023 



Iron and alumina , 0005 



Lime 0013 



Magnesia 0013 



Potash 0005 



Soda 0033 



Chlorine 0040 



Sulphuric acid . .001 1 



Phosphoric acid 0001 



* Lavas and Soils, etcetera, p. 170. 



