114 I. P. Косн. Survey 
H 
of Northeast Greenland. 115 
Urs. min. : i 
a min 24/IX 1907. different signs. This facilitation is not 
Sea FEER 5 pe — = only permissible in the light of the 
| 7 egasi ыы Pegasi 7 Piscium x Piscium 6 Ariefis | „ Arietis Е1 Ceti &2 Ceti accuracy arrived at, but still more so in 
| Telesc. and level LE =1.08|w + 1.10 |w + 0.89 Е 0.89 - RG = TEE = Bin the light of the fact that the collimation 
| N Wiss de: pe was rather changeable and consequently 
ERNE a 21h35m43s 21h57m26s 22h08m10s 24123m2% | 139m09s Oh49m34s Oh53m43s had to be computed every time by 
88948' 38” Er BØ = 9 | 264, | 126 15 4 196 49 1 26 49 means of the observations. This being 
и Е 88°48 38" № 33048’ 38” | 889487 38” | 88°48 38" so the computation of the collimation 
о 5 2 | would only lead to а false idea arising 
u | re & + ee ee eae sie м On40m20s.30| Oh45m21s.91 | Ob59m1 15.47 as to the accuracy of the observation. 
| 044! an 5 = Е у 32.5) i .52 À Г . A A 
Е ] | 29°44" 23 24°06’ 56” 2046 43" 0°45 04” 20991’ SAD eat rt N, se Be ae The rather circumstantial computations 
3 Be gr = — — = = i which the determination for time in the 
ee Sa a) | ir amas 20h30m37s | 20h41m21s | 22866140 D oyn05m20s | 23h15m45s 93196m 545 vertical of the pole star requires have, 
l'=t (time) | 2110 01 21 16 25 | Eu Sp >. en = F = 3 1 2 Se 1 24 04 as a rule, a rather deterrent effect on the 
t' +t (degrees) |317°30' 15” 319906" 15" |324°36 45” | 397034: 00" Fe SÅ En Ee ets ae so eae ER non-professional. One must, however, 
Argument Albrecht 33 | 1 HO area = = -__ mot overlook the fact that a large per- 
Es å | re 1668 691462 | 6.36123 _ 7.88537 7.94264 | 748112 … 7.45681 centage of the computations mentioned 
ae cos (t +t) | 9.86766 | 9.87847 9.91130 9.92635 9.99868 9.99698 9.990984 une у above теег to the making of certain 
se aaah | 9.75687 | 9.65094 8.68605 | 8.11761 9.56942 9,62839 917001 9.15036 auxiliary tables, in other words, а work 
Be | 8.31727 8.31727 8.31727 | 8.31727 8.31727 Е which is done once for all. The сот- 
log sin (ЕВ 9.82965 n 9.81608 9.7 | = 8.31727 8.31727 8.31727 
Albrecht 33 | + 389 i a i eg и 8.89234 9.06965 | 9.22324 934352 putation of an observation of four transits 
— | = a aN ee 10 385 382 132 125 is scarcely more circumstantial than that 
Г log ADT | 1.90761 п | 7.18730 п 6.76643n | 6.164401 6.18238 101913 | 6.71184 6.81240 of a group of twelve zenith distances. 
ЕО И SER dn 5 Е Е 5 = The matter is more complicated than 
log sin æ | 7.90760n к eva Be 0.37161 0.32999 0.84964 the ordinary measuring of the zenith 
Е ЕЕ eee > eee ee 7.01913 6.71184 6.81240 distance and offers more technical diffi- 
1 . | | . * С - . D 
SET | i 8.77951 bur 876514 п | 8.70916n |  8.67557n 7.84174 8.01952 8.17061 8.29082 culties, but it is in its turn more reliable, 
T le 97.477 |: op or Re oo” |. a aoe FE | = n being independent of the largely varying 
+ 4 |1 305 faders Få 0 3’ 36” 1’ 46” 2 14” i i i i ions. 
Me: hs 3°27 02 +3°20 18 |+2°56 03 11.2042 56 12.008 53 №: 0235 58 |:0°50 55 |+-1e07 10 refraction which: occurs in AUCH reg n 
xm 7 +2 59 15 т т Er Е : If when measuring the zenith distance 
Tr BR. | +26 12 _ |424 08 |+242 26 |-02 48 №032 22 |: 049 09 |:104 56 one tries to guard oneself against the 
(т): 15 | Е FR: ES i efraction by observing 
Fam i 15 | Паб 0811m56893 — 0811m868.20| 01084958 + 0h01m2782 +. ono2moge.47 |+- 0h03m165.60 | + 0h04m195.78 ANR О у = 
de. | 107 a 107 31.27 | 107 5037 | 108 5459| 121 128 1 21 37.97| 122 44 61 f 1 24 03.61 two stars, one in the east and one in 
$ а. | + 1.40 | = 1.43 116 | + 116 | zo = 130 + 14 the west, this method loses a good deal 
НЫ cos 42 (2) | == SØ | + 9.05 | GER | + 961 | HE see + 930 Art of its attractive simplicity, while at the 
= —|- | É à 3 same time the computation work is nearly 
d TE = —— — pe ee en 
a! — ae.) es | 119 3552 119 3496 | 119 3587 119 36.92 | 119 3601 | 119 3597 guy 
Mean оби a ion у = - = al Whether electing to employ the one 
zu eh DER р | N SE 1996-08 method ог the other, one ought to be 
En 21=5 111.6 da = 4 о — provided with a large star catalogue. 
Hourly rate BF Seas —— = Ва 
a = Sl The Danmark-Ekspedition only had at 
O86 its disposal the star catalogue in the full 
