Appendix B. 



Referring the ohservations of the 26th, 27th and 28th June to the date of 

 those of the 11th, and using the daily correction - 0^-509 we get, by applying 

 the just found mean daily correction P"635, the following values for the 

 longitude of Bujongolo : 



11th .lune. 

 11th 



nth 



11th 



26th 



26th 



27th „ 



27th „ 



28th 



28th 



Sun at W 



Sun at E. 



À=P59'" 53' 

 53 

 49 

 49 

 55 

 54 

 52 

 54 

 50 

 = 52 



Grouping these results for each single day of observ 



Bujongolo. — 11th June X 



-'6th „ „ 



27th „ „ 



28th „ 



8 E.G. 



5 „ 



9 „ 

 „ 



5 „ 

 3 „ 



9 „ 



2 



8 „ 



ation we get 



P 59m 5p.5 



54-9 



53-8 



51-5 



Disregarding further considerations as to weight, and given the degree of 

 approximation now required, the mean of these data is : 



Bujongolo \-l'> 59™ 52^-9 E.G. 



This value is used in calculating the Greenwich time at the moment of the 

 emersion of B A C 81 from the lunar disk, which phenomenon occurred on 

 11 til July undei- most favourable conditions for observation. The determina- 

 tions of the horary angle, obtained for this occasion with the view of 

 ascertiiining the state of the chronometer respecting the mean local time, 

 gave the following results : 



312 



