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201
i — 4 (46.385 — 0.15Q0. T — 0.000314. T2) (1 — 0.00008118 p)p
p beregnes forresten ved successiv Tilnærmelse (Se S. 148).
Den følgende Tabel indeholder Observationerne og de
deraf beregnede Trvk ved Havbunden i Atmosfærer.
No. Stations No. h <r 2 T 1/ V
: 358 93 78» 2’ 1.02604 2.»8 45-037 ■ 6.95
2 3 59 416 78 2 760 2 .0 46.066 75-97
3 . 307 1216 74 58 786 0 .26 46.344 222.8g
4 207 1280 72 36 786 — [ .07 46-555 234.66
5 353 1333 77 58 781 —0.66 46.490 244.48
6 354 1343 78 i 781 —0 .66 46.400 246.33
7 349 1487 76 30 782 — i .20 46.575 272.90
8 305 1590 75 ■ 787 —0 .78 46.500 291-93
9 350 1686 76 25 774 -I .36 46.602 309.66
10 302 1985 75 ’6 1.02765 — t .40 46.607 365.01
Bestemmelse af Vandets Sammentrykning i
Piezometret.
Er i Temperaturen ved Havbunden,
m Piezometrets Stand (ved Temperaturen t) ved
almindeligt Lufttryk,
m’ Piezometrets Stand (ved Temperaturen t) ved
Havbunden, angivet af Indexens Stilling,
ij, og 6 og •/. Constanter (y. rr Glassets
Sammentryknings-coefficient),
saa har man:
Vandets Volum ved t° og almindeligt Lufttryk =
(C — cm) (i + at + ftj*) = V
Vandets Volum ved t" og Trykket]? paa Havbunden =
(C - c m’) (1 -I- «t + ft t3) (i — y-p) = V’
V— V = V(i],p — ep>2), hvor :
T’— F _(C—cm) —- (C —
V - C —
Determination of the Compression of the Water in the
Piezometer.
With t as the temperature at the sea-bottom;
m as the reading of the piezometer (temperature t)
at ordinary atmospheric pressure;
m’ as the reading of the piezometer (temperature t)
at the bottom, indicated by the position of the
index;
>/(, e and /. as constants, z = the coefficient of
compression of the glass;
we have: —
The volume of the water at t° and ordinary atmospheric
pressure = (C — cm) (1 + at + ft t*) = 7;
The volume of the water at t° and the pressure p at
the bottom = (C — c m’) (1 + a t -f ft t*) (1 — v.p) = F;
r 50-153 — o. 1590. / — 0.000314 t*
cm’) (1 —-/.p)
= iitp —
ep-cm • ’
(C’— cm) r’p — (C— cm) ep2 — (C— cm’) /.p = (C— cm) — (C - cm’) = c (m’ — 1»)
lC
— wi tjt V ■
lc \ 2 lC ’\
— m\ ep1 — — m y/.p — m
Hver af de 10 Observationer giver en Ligning af
denne Form, og af disse kunde Constanterne ij, e og /.
bestemmes.
Da Værdien af maa antages at være bestemt
nøjagtigere ved Fysikernes Observationer, (ved hvilke Glassets
Sammentrykning og Temperaturens Indflydelse bedre kan
bestemmes).end den kan findes af Piezometerobservationerne,
har jeg antaget y, bekjendt og søgt af Ligningerne at
bestemme de sandsynligste Værdier for e og •/..
ugernes Fonn bliver da
- røj j;2. e + – m’ j p /. — — wj tjt p — (m’ — m).
Uen norske Nordhnvsexpedition. H. Mohn: Nordhavets Dybder, Temperatur og Stromninger.
Each of the 10 observations gives an equation of the
above form; and from these equations the constants 1;, e,
and /. admit of being determined.
Since the value of qt in all probability has been
determined more accurately by the observations of the
physicists (from which the compression of the glass and the
effcct of the temperature can be determined better) than
it will admit of being found by the
piezometer-observations, I have assumed j;, as known, and have sought to
determine from the equations the most probable values of
£ and •/..
The form of the equations will accordingly be
IC
p I com]mte by successive approximation (See page 148).
The following Table contains the observations and the
pressures at the bottom computed from them, in atmospheres.
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