ANALYSIS OF SEA- WATER FROM COOGEE. 59 



determination of ' chlorine ' with the higher degree of 

 accuracy obtainable. 



In the present case there is nothing to note about the 

 methods employed to determine the various constituents — 

 old standard methods being used throughout, but great 

 care was taken to obtain as accurate results as possible 

 (e.g. weighing amounts of water taken instead of using 

 volume relations etc.) — and thus results capable of com- 

 parison with recognised analyses. 



The results obtained for the solid contents of the Ooogee 

 water, expressed in grams per kilo were as follows: — 



Mean. 



01 ... 

 Br ... 



::: w 



119-449 U 9 . 472ft) 119*446 

 1 •0823j Jy4/ZW 1 *062 



SOs ... 





2*310 2*290 2*300 



OaO ... 



... 



*588 *586 *587 



MgO ... 



... 



2*164 2*204 2*184 



K 2 ... 



. .. 



*485 *475 *480 



Na 2 0... 



... 



14*600 14*454 14*527 



Subtract O equivalent to halogen - 4*3939 



.*. Total salts per kilo (omitting 00 2 ) = 35*192 



(a) = 19*477 total halogen estimated as chlorine. 



(b) = total halogen estimated as 01. 



The theoretical quantity of total salts in gms. per kilo, 

 taking the specific gravity previously found and Dittmar's 

 factor, would be 19*475 x 1*8058 = 35*267; subtracting from 

 this the average amount of OO 2 (not estimated in above) as 

 *051 gms., 1 we get 35*216 gms. per kilo of sea- water. 



[Combining the constituents found in the generally 

 accepted way, and omitting C0 2 we obtain the following 

 results : — 



1 Calculated from Dittmar's table — Challenger Report, (Physics and 

 Chemistry) Vol. i.,p. 203. 



