( 391 ) 
even admitted 1 gram per liter. Since the appearance of JoLy’s 
paper, VON Romer and Lozinsk1 have still taken the average quantity 
of chloride of sodium in river water as the basis of those calcula- 
tions. Won Romer, according to the analyses cited by BiscHor 
and Rots, had calculated 9 mgrm, Lozissk1, from 8 rivers by 
Rota, 7.97 mgrm per liter of river water. 
In the following table, which makes no pretention of completeness, 
in which however most known analyses that can serve our purpose 
are made use of, as many new and better analyses as were disposable 
have been selected. Besides rivers some lakes with an outlet, properly 
river enlargements, the composition of whose waters, relatively speaking, 
is little variable, have also been taken. A number of smaller rivers, 
which possess a very deviating high amount of chloride or sodium 
or of both, in consequence of quite local causes, sometimes due to 
man, are left out. As extremes I name, among the former, the 
Chélif in Algeria, which contains at Orléansville 200 mgrm of sodium 
and 316 mgrm of chlorine, higher up at Ksar-Boghari, even 1296 
mgrm of sodium and 2163 mgrm of chlorine, being a surplus of 
chlorine of 171 mgrm per liter, and the Cettinje in Dalmatia, 
which has at Podgaraje a quantity of 38.8 merm of sodium and 
175 mgrm of chlorine, with a surplus of 115.3 merm of chlorine 
per liter of water, on account of the abundance of salt in the soil 
of the drainage area. The Gergogne and the Beuvronne near Paris, 
owe their chlorine surplus of 10 and 8 mgrm quite certainly 
to the pollution by manufactories. When calculating the average 
quantity of sodium and chlorine in river water these analyses cannot 
be made use of. Such circumstances affecting the quantity of sodium 
and chlorine in river water independently of true chemical denudation 
play also their part in most other rivers, howbeit in a smaller degree. 
„ 
Milligrams per liter (parts in 1000000 parts) of water 
RIVERS and RIVER-LAKES = 
Cl that it 
Na | Cl | could be Combine with 
: T the Na 
with the Na 
IM Eaeer (bic) iia Sena NE earder en oe yee | 3.44 5.89 5.29 | -0.60 
2. Klbe (Tetschen near the N.fronteer Bohemia) 5.46 8.81 8.40 | -0.41 
3... Danube (ahove Vienna). ….. 2. . « 4. 2.82 2.40 4.34 1.94 
4. Lake of Geneva (Geneva). ....... 4,12 1.20 6.34 5.24 
5. Moldau (before Prague and about 10 K.M. 
LR DE EEE AGREE hg eet 5.98 6.87 9.20 2.33 
6. Thames (Londen, at 6 localities, from Ditton 
fey Lat A142 A, + Set vel oP a BE A ee ay 11.23 | 14.06 | 17.96 3.90 
Te inne (Mayemcey A is foi og Sos, tetes verk. 2.18 3.47 3.35 -—0.19 
oe ANE: OV ORE DEN DoS AO BS 6.23 8.79 9.58 0.79 
9.7) der (above: Cologne) ves. 15 52... nd ed. 4.00 6.15 6.15 0 
26* 
