=) OOM = RAPPORT 1905—06 ANNEXE B 
The results obtained for Oxygen and Nitrogen may be represented by the 
Formulae: 
0, = 10.291 —0.2809¢ + 0.006009 ¢2 — 0.000063 238 — CI(0.1161 — 0.003922 ¢ 
—- 0.000063?) 
N, = 18.561 — 0.4280 + 0.0074597 ¢2 — 0,00005494.¢8 — C1(0.2149 — 0.007117t 
—- 0.000095 ¢?) 
Tables calculated from these formulae are in manuscript and may be ob- 
tained from the C. L. 
In the case of the Oxygen, the values for distilled water are in close agree- 
ment with those obtained formerly by Dirrmar, WınkLer and Bour and Bock and 
are somewhat higher than those obtained recently by Jacossen. In the case of 
Nitrogen, the determinations of former workers have not given quite such uniform 
results as in the case of Oxygen. The results obtained for Nitrogen in distilled 
water by the C. L., fall between those of the two most modern determinations, 
namely those of Wınkter and of Bour and Bock; at low temperatures the agree- 
ment with Winkter’s determination is almost perfect, while at higher temperatures 
the values of Bour and Bock are approached. Hamprre’s Nitrogen tables for dis- 
tilled water and sea-water, hitherto in use for hydrographic purposes, agree 
remarkably closely with those now obtained; they appear to be slightly too high 
for low temperatures and low salinities, and slightly too low for high temperatures 
and high salinities. 
In the case of the Carbonic Acid, the programme has had to be altered and 
extended, in order to meet the peculiar difficulties of the problem and the attain-. 
ment of suitable accuracy. It has been brought to the notice of the C.L. that the 
question of the conditions of equilibrium between free alkali and carbonic acid in 
addition to that between total alkali and carbonic acid are of great importance 
from a Biological point of view, and it has therefore been decided to enlarge the 
scope of the work to include also this former relationship, in addition to the latter. 
Tt is expected that this work will be very shortly completed, and the whole of 
the work on Absorbtion Coefficients and allied questions, will then be published 
in detail. 
VI. 
In conformity with the resolution of the Council the C. L. has arranged for 
the determination of Cl, SO, and o, in sea-water from certain prescribed localities, 
with a view to an examination of the constancy of composition of the salts dis- 
solved in sea-water in the case of waters of widely different origin. 
For the collection of the water-samples required, green glass-bottles of 
6 liters were ordered and left standing filled with warm water for more than two 
Vv 
