( 102 ) 



The observations were made in the factory of the firm Hatton 

 and Cookson. 



Determination of the longitude. A time determination of 26 Dec. by 

 means of 4 observations of /? Orionis in both positions of the instru- 

 ment, each time over 7 horizontal threads, yielded the following' 

 collections of the chronometers to the mean time of N'Kutu. Together 

 with these 1 give the corrections to the mean time of Chiloango 

 derived by simple interpolation — the best thing to be done — 

 between the time determinations of Dec. 20 and Jan. 3, and finally 

 the resulting difference of longitude. 



December 26.296 (M. T. Chiloango). 



Hohwii Hewitt 



Correction to M. T. N'Kutu + 48™48\85 -f 49'»22 s .35 



„ „ Chiloango 46 50 .29 47 22 .27 



Difference of longitude — 1 58 .56 — 1 60 .08 



Adopting the simple mean of the two results, we find for the 

 longitude of N'Kutu relatively to Chiloango 



— I" 1 59*.32. 



Determination of the latitude. On December 29 I secured a deter- 

 mination of the latitude by 3 pairs of observed zenith distances, i.e. three 

 observations in each position of the instrument, of J Andromedae 

 (z = 40° North) and by 2 pairs of a Eridani (z = 53° South). 

 The results were : 



p Andromedae 1*' pair — 4°57' 9".90 

 2 d „ 11.06 



3-3 „ 1J.24 



Mean 10.73 



Corrected — 4°57' 5".74 



a Eridani 1 st pair - 4°56'57".69 



2=- d „ 59.81 



Mean 58.75 



Corrected — 4°57' 3".72 



Hence the mean result for the latitude is: 



— 4° 57' 4.7 



