GEELMUYDEN. ASTRONOMICAL OBSEKVATIONS. [NOIIW. POL. EXP. NO. e.j 



Assuming the mean acceleration 12 S .5 this clock 

 error would correspond to I = 4 50'; an accele- 

 ration of 9s.5 would give I = 5 12'. 



This was the last observation. After some hours of rowing on the morning of June 15 

 und a necessary repairing of one of the kayaks the following day, the travellers met Mr. Jackson 

 on June 17. 



On June 18 a comparison with Jackson's chronometer gave: 



Watch I 2h 10m am I_Gr. = Oh 20m 40<>.7. 



Applying to this the loss through stopping 4'' 24 m 6 s , mentioned above, and acceleration 

 12 H .5 daily in 3.7 days, the result will be: 



June 14, Watch 1 lh 49m pm I-Gr. = 4^ 44m is 

 which combined with the above correction to Local Time will give: 



Longitude of Station June 14 = 3l> 21" 18s = 50 20' E 

 Applying further A = 4 50 



the longitude of the Winter Hut will be 55 10' E, or 55 20' by application of the correction 

 of + 10' to the longitude of Cape Flora mentioned in the introduction. 



On comparing this result with the longitude of the Winter Hut given on p. 125 as 

 following from the observations of the preceding year, it will be seen that if the mean rate of 

 watch I has not differed sensibly from the then assumed value 12 s a day, which was very 

 nearly the same as that found during the travelling in 1896, the quantity J of the preceding 

 year may be neglected. 



