376 



FETTEUSSON, SIEERIAN SEA. 



the oxalate after doubly repeated precipitatioii witli oxalate 

 of ammonium. 

 . 2) Magnesia was weighed as Mg2 04P-i03. 



3) Sulphuric acid [ealculated as SO3] was determined as 

 BaO. SO2. 



4) Potassiiim [ealculated as KaoOJ was determined as 

 KaoCUPtClo. 



5) Sodium [ealculated as Na^O] was determined as NaCl 

 [from the difference between tlie sum of ehlorides [KaCl + Na Cl] 

 and Ka Cl]. 



6) Chlorine + Bromine was determined by titration with 

 silver nitrate [by th.e autborj. 



Sea-waters (Siberian ocean). 



The proportions of tbe eonstituents relatively to chlorine 

 (== 100) are represented in the tables 1 & 2 in the 5*^ Chapter 

 of the preeeding paper. The chemical composition of the 

 water from tbe difterent strata of the Siberian Ocean is — 



tion of sea- water ]>}' its percentage of Ka-^O, NaiO, Mg O, CaO, Cl, SO3, I felt 

 bound to obey the general rule, of Avhich I, however, can not approve, although 

 it is supported by eminent authorities. On the other hand I have purposely 

 abstained from the nianner of rational computation usually adopted in water- 

 analy.sis, viz. to groupe together the basic and acid or halogen radicals into 

 definite .saline compounds: NaCl, MgSOi, etc... which depends upon hypo- 

 thetical assumptions not .sufficiently Avarranted by facts. 1 think that the 

 discrepancies in the hydrographical measures and methods conld best be 

 removed by International agreement. 



