274 I. P. KOCH. 
The observations are grouped in the usual way in three pairs, 
and every single pair is computed by the formula 
tan 1/2 Ё = + V seca sec (в + 2) sin (в + д) sin (6 +9), 
where в = Ч (2 + 6 + 2). 
Clock time ...... Gh22m51s 6h25m]9s | 68270483 
Correction to Grw. | c.+ 1 30 +1 30 + 1 30 
Mean time at Grw. 7h.88 7h,92 7h.96 
Вед ar о 71°25'57" | 71°30'00” 
EVE ADN IE 8 |+ 8 | + 11 
Refraction . ... + 306 |+ 307 | + 3 08 
Dame | + 1543 | + 1543 | + 15 43 
Geocentric z..... 71 4034 | 714455 | 71 4902 
OBIE. OF EU 18 4407 18 4408 18 4409 
EEE 83 2917 | 832917 | 83 2917 
DO ee | 17211358 17211820 | 17212208 
и | 86 5659 | 86 5910 | 870114 
DEZ nes | 15 1625 SOS lolly 
Or OM ae he eae 68 12 52 68 1502 68 17 05 
Bo. а 2H! | 3 27 42 3 2953 3 3157 
LOS sec EEE Ir 1.21399 ele 2920) 1.28421 
— — (62) .... | 0.01562 | 0.01554 | 0.01548 
— sin(s +0) .... 9.96782 | 9.96793 | 9.96808 
— — (0 +9).... 8.78090 | 8.18543 8.78968 
| 0.03833 | 0.04810 | 0.05740 
оса. | 0.01917 | 0.02405 0.02870 
En ee | 92316 | 93102 | 93°47.0 
— | 6h10m06s | Ghl2m4ls | 681508 
Equation of time. | + 3 49 (UNS 49 0 NES T0 
Mean time....... | 6 06 17 | 6 08 52 6 11-19 
Glock time RS | nen) 6 27 48 
Correction ....... | = «16 34 | =, WG OT: 6 59 
As a mean we get the clock correction - 1630$ with a 
mean error of three to four seconds of time (about 200 metres). 
As was the case at the determination of latitude one may at the 
determination of time point both of the limbs of the sun, in order to 
escape systematic errors of pointing; in that case one ought not to 
let the sun elude the horizontal thread as indicated above, but one 
ought to point both limbs by means of the slow-moving screw. 
The edge of the inland ice, 23/V 1908. Afternoon. De- 
termination of time. Observer: Kocu; Assistant: GUNDAHL-KNUD- 
SEN. b — 756 mm; Ё = + 4.0; one division of the level = 20”; 9 
