Survey of Northeast Greenland. 269 
Latitude,noon16/VIII 1908 (Observer Kocu, Assistant GUNDAHL- 
KNUDSEN). b = 702mm; t= + 11°C.; one division of the level 
— 20”; calm. Instrument placed on smooth inland ice about 8 kilo- 
metres east of Jættebrinken (giant’s bluff). I = 1534™ w. of Grw.; 
clock correction s + 43™105. 
Telescope left | Telescope right 
| Vernier | Level | | Vernier Level 
Clock time | | г | Clock time |——— TE 
| А В Obs. Obj. | | Å B Obs. | Obj. 
11h07m32s | 301°30'.1 | 30'.8 | 13.0 | 5.0 | 11n10m34s | 580397 | 40.2 | 5.0 | 13.0 
О 12 06 | 31:25) 312. | 1301501043 54 | 39.5 | 40.1 | 50 | 13.0 
15 32 | 31.1 | 312 | 13.5 | 5.5 | 17 16 | 39.6 | 40.2 | 5.0 | 13.0 
1180906з | 302901'.8 | 02.4 | 12.0 | 4.0 | 11811133 | 58°07.7 | 08.6 | 40 120 
С 12 56 02.5 | 02.9 | 13.0 | 5.0 | D 33 07.5 | 08.4 | 5.0 | 13.0 
16 24 | 024 | 02.7 | 135 | 555 | 18 05 | 077 | 086 | 60 | 140 
Estimate by the two middle pairs. 
360° = 301°31'.2 = 58°28'.8 
Telese. left ... ; A 
\ 360° + 302902'.7 = 57 57.3 
; Г 58 39.8 
Welesestichtn.2..:: . 222000 2% © 
elesc. right | 58 079 | 
Mean 58°18.5 
Level 0.0 
Refr. + x + 1.6 
0+19052 
ф==71°25'.3 
In the foregoing examples the reduction to the meridian has 
been computed corresponding to the mean of the clock times of 
every individual pair. Here where the utmost accuracy is aimed at, 
a facilitation of this kind will hardly be permissible, and the reduction 
must therefore be computed for each single pointing. 
By using the values of yg, 0 and = employed in the estimate we 
get the reduction to the meridian: 
cos a COs 2 x 26 eee = 0.579 x 20 nl 
sın z 2 2 
Apparent: noamsa rer eee 12600008 
Equation of mess"... 2. = 3 49 
Mean time at apparent noon... 11b56m11s 
Clock: correction... ei. — 43 10 
Clock time at apparent noon .. 1181322015 
