Figuren Pl. IT, Vanddampenes Tryk 1876, viser den 
observerede og den beregnede Curve. MF = +0.""019. 
Efter Formelen beregnes: 
Minimum SO HO asin, 
Å — 0.7709, 10% 14” p.m. 
; IE OAD), NE BV? pain. 
Medium indtræffer: 8” 18” a.m. og 7" 35” p.m. 
Amplitude: 0.724. 
Den beregnede Curve ligner Curven for den daglige 
Variation af Vanddampenes Tryk paa Indlandsstationer 
med sit secundere Mmimum om Eftermiddagen. Dette 
Minimum er ikke fremkommet ved nogen storre Vindhastig- 
hed, der paa den Tid af Dagen skulde have gjort det 
psychrometrisk bestemte Tryk af Vanddampene mindre, thi, 
som Curven for Vindhastigheden i 1876, Pl. III, viser, har 
denne ogsaa et secundert Minimum omkring Kl. 2 Eftm. 
1877. 
Den første Gruppe omfatter 19 Observationsdage i 
den varme Strom. Dagene ere de samme som de, der ere 
benyttede til Luftens Temperatur, med Undtagelse af den 
2ide Juni, der ikke er medtaget her, fordi det vaade Ther- 
mometer i flere Timer ikke havde været tilstrækkeligt vaadt. 
The figure in Pl. IT, Force of Vapour, 1876, shows 
observed and the computed curve. MF = + 0.019. 
From the formula were computed — 
Maximum; + 0.713, 4 32” p.m. 
$ SE Qi, iil! Sere am, 
Li an? (NÆS Or 
= Drem 
The Mean occurs at 8" 18” a.m. and 7” 35” p.m. 
Total Range: 0.724. 
The computed curve resembles the curve for the 
diurnal variation of the force of vapour at inland stations, 
with a secondary minimum in the afternoon. This mmimum 
is not the result of any increase in the velocity of the wind, 
which, at that time of the day, should have reduced the 
psychrometrically determined force of the vapour; for, as 
shown by the curve for the wind-velocity in 1876, Pl. ITI, 
this velocity, too, has a secondary minimum about 2 p.m. 
1877. 
The first group comprises 19 observation days in the 
warm current. The days were the same as those devoted 
to determining the temperature of the air, with the excep- 
tion of the 21st of June, which is not included here, since 
the wet bulb during several hours on that day had not 
been sufficiently supplied with water. 
Den (on the) 16 Juni (of June) 1” am., var Vanddampenes Tryk (the force of vapour was) 7.74. 
Å å; 21 G 5 DB, 
a - Forskjel (Difference) TET rtm 5 = 0,042 = co, 
Den (on the) 22 Juni (of June) 1” a.m., var Vanddampenes Tryk (the force of vapow was) 5,”"4. 
å 23 på ; å DE 
å Forskjel (Difference) Å i jr NET 0.731 = — 0.730 =e. 
Den (on the) 28 Juni (of June) 12” p.m., var Vanddampenes Tryk (the force of vapour was) 4.”"9. 
0 Forskjel (Difference) AT ee i — 2 mnd 19 = — 1715 =e. 
am. var 
Den (on the) 3 Juli (of July) 1% 
» ” 8 7 ” 
Vanddampenes Tryk 
(the force of vapour was) T.”"6; 
by 
- Forskjel (Difference) 
Nå gm, vert 
Den (on the) 16 Juli (of July) 
20 
” ” 3 ” 
Vanddampenes Tryk 
6 2m? 
ile 
mn4 5 = 0,28 = 6, 
was) 8.7"). 
bn, 
(the force of vapowr 
— Forskj el (Di fie en ce) 
Den (on the) 25 Juli (of July) 1% a.m., var 
BU 5 å å 
-— Forskjel (Difference) 
> 3 
For den hele Gruppe bliver c= + 0.058. 
Den gjennemsnitlige Fejl i Observationsklokkeslettet 
ved Middag bliver — 2.”3., 
Vanddampenes 
4 =0.""35 =c. 
| mm.» 
Tryk (the force of vapour was) 6.7, 
5 Tm, 
? i — 1.222 = 060 =e. 
For the whole group ¢= + 0.7058. 
The average error in the hour of observation at noon 
is — 2."3. 
