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the oxalate after doubly repeated precipitation with oxalate
of ammonium.
. 2) Magnesia was weighed as Mg>04 P2O3.
3) Sulphuric acid [calculated as SOa] was determined as
BaO-j SO2.
4) Potassium [calculated as Ka20] was determined as
KajCUPtGl*.
5) Sodium [calculated as Na>0] was determined as NaCl
[from the difference between the sum of chlorides [IvaGl + NaCl]
and KaCl].
6) Chlorine + Bromine was determined by titration with
silver nitrate [by th,e author].
Sea-waters (Siberian ocean).
Locality. Depth Metres. Ka20 in percent. Na20 in percent. MgO in percent CaO in percent. S03 in percent. Cl + Br. in percent.
Lat. Long. E. G.
IT 39’ 105 o 0’ 128 O.O493 I.4272 O.2155 0.0565 0.2228 I.920
70° 14’ 17° 17’ 22 o 0440 I.244O 0.I063 0.0510 O.1944 I 691
73 59’ 113o 12 I I 0.0265 O.7S17 O.1236 0.0320 O.I248 I.065
73’05’ 144’40’ 7 O.OI9O O.56S0 O.O874 0.0240 0.090S O.763
Salt brines and crystals found upon the ice.
liquid intermingled with]
crystals of snow collected V 0.1802 5.3S12 I.9O8O O.4323 O.1617 9.636
at — 32’ C
liquid inundating the ice I
at —32o C (free from O.2787 8.2247 I.9I68 o 4646 0.1508 13.198
snow). 1
The proportions of the constituents relatively to chlorine
(= 100) are represented in the tables 1 & 2 in the 5th Chapter
of the preceding paper. The chemical composition of the
water from the different strata of the Siberian Ocean is —
tion of sea-water by its percentage of lva20, Na20, MgO, CaO, Cl, SO3, I felt
bound to obey the general rule, of which I, however, can not approve, although
it is supported by eminent authorities. On the other hand I have purposely
abstained from the manner of rational computation usually adopted in
water-analysis, viz. to groupe together the basic and acid or halogen radicals into
definite saline compounds: NaCl, MgSOi, etc... which depends upon
hypothetical assumptions not sufficiently warranted by facts. 1 think that the
discrepancies in the hydrographical measures and methods could best be
removed by international agreement.
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