”bde ban er Tryk-Corr. Tryk-Corr. 
No. Favne. GAR B. ne | Ber. O-B. 
(Hathoms.) ; (Comp.) 
96 803 — 1°.09 — 20.26 7% 17 + 19.13 + 0.04 
07 683 — 1.13 — 2.10 O .07 oO .96 + I 
98 388 — 1.01 — 1 .52 O .51 0.55 = 4 
120 700 — 1.18 — 2.10 0.92 I .00 — 8 
179 | 1607 — 1.20 — 3.55 2 BS pA) + 7 
180 1594 — it 420 — 3.76 2.56 2.25 + 31 
184 1547 = å ol = 8 83 | 2 .36 2 .49 == 1 
213 1760 — 1.11 = 3 JJ | 2 JO) 2 .49 ++ II 
218 968 — 1 .35 — 2.66 | i GÅ å 30 — 5 
10059 14.75 f = + 0.001466 
It, 
246 1592 — 1.38 — 3.60 + 2.22 + 2.25 — 0°.03 
6 = + 0.001394 
VIL. 
246 1592 — 1.209 — 3.60 + 2.31 + 2.25 + .0°.06 
fø = + 0.001451 
Af samtlige Observationer faaes | From the total number of observations we have 
| 8 = - = o:oora28 
eller: Trykcorrection 
for 1000 Favne = + 1°.428; for 2000 Favne = + 2°.856 
Buchanans Opgave 
6 = + 0.001428, 
or: pressure-correction 
for 1000 fathoms = + 19.428; for 2000 fathoms = + 20.856 
Buchanan’s Correction 
+ 1 .381; 2 .762 + 1 .381; 2 .762 
Forskjel 0.2047 09.094 Difference 09.047 0.094 
Middel + 1.405 2 .809 Mean + 1.405 2 .809 
For 1877 har jeg reduceret Kviksølvpiezometrets Af- 
læsninger med en Trykcorrection af —+ 19.405 per 1000 
Favnes Tryk, efter en derefter construeret grafisk Tabel. 
Med denne faaes MF = + 0.078. 
For 1877 bliver saaledes for Kviksølvpiezometret 
225.2 
3.0035 
1878, Marts 8 blev Kviksølvpiezometret sammenlig- 
med Normalthermometret og dets Nulpunkt bestemt 
Hvert Ta: 
a 
til= 
—- 1.405 
1000 
net 
paa det meteorologiske Institut i Christiania. 
beror paa 4 Observationer. 
For 1877, I have reduced the readings of the Mer- 
cury-Piezometer, with a pressure-correction of + 10.405 
per 1000 fathoms, according to a diagram-table construct- 
ed for that purpose. With this, MF = + 0°.078. 
Hence, for 1877, the Mercury-Piezometer gives 
2 2562 
3.0035 
1878, March 8, the Mercury-Piezometer was compar- 
with the Standard-Thermometer and its zero deter- 
mined at the Meteorological Institute in Christiania. Each 
a 
+- 1.405 
1000 
ed 
| figure is based on 4 observations. 
Normal Piezom. Piezom. Ditt. Temp. Diff. 
(Standard) One Ber Ber, i 
Therm. 2. (Comp.) | O-B. | (Comp.) O-B 
=> _ 7 man MN. MM. F 0 0 
0.00 224.50 La 
4 +95 209.90 209.96 — 0.06 4 .07 — 0.02 
8 .60 199.25 199.24 + 0.01 8 .60 0 .00 
12 .95 186.50 186.45 + 0.05 72 «OG + 0.02 
26 .50 820.15 mm. MF = + 0.04 mm. MIN = PPO"O53. 
å XX 2245 == 803400 
a 224.5 — a 
77.85 OS QO t = ———__ 
2.938 
