( 120 ) 



bj means of 52 chronometers on the home 



voyage ') 3^'bOMO\()^ 



from observations of the moon : 

 from 11 occultations (7 disappearances and 



4 reappearances at the dark limb) 3h50'"40s.60 ± 0^33 



from 12 culminations of the moon 42 .6 



Assigning to these two results weight 2 and 1 , 

 we get as mean result 3''50™41«.27 



Reduction on St. Denis flag-stafF determined 

 by transportation of chronometei-s — 8"153^4l 



Hence longitude of St. Denis tlag-staifE. of Gr. 

 from the chronometers 3''41'"46«.62 



from observations of the moon 47 .86 



The German observers found for the longitude 

 of Solitude^) 



from 6 culminations of the moon 3h50'"39^52 ± 3«.29 



from 3 occultations 40 .33 ± 1 .91 



whence in the mean 3 50 40 .13 ± 1 .65 



Now Solitude is situated 0s,89 west of Belmont, 



Belmont 8m53 ,41 east of St. Denis, 



hence Solitude 8 52 ,52 ,, ,, ,, ,, . 



Hence longitude of St. Denis (flag-staff) E. of Gr. 3''41"^47«.6J 



Combining all these results, omitting only that from the chrono- 

 meters (comp. footnote) we have : 



by means of the longitude of Belmont, Weight 



*^ (observations of the moon) 3'^41™47^86 ± 0^90 J ,25 



by means of the longitude of Solitude, 



(observations of the moon) 47 ,61 ± 2 ,00 0,25 



determination by Germain (culminations 



of the moon) : 47 ,40 db ,76 1,72 



determination by Oudemans and Bak- 



HUYZEN, (occultations with corrections 



according to Auwers) : 47 ,96 =t ,93 1,16 



Adopted longit. of St. Denis flag-staff 3^41 '"47^,69 ± 0^,44 4,38 



^) Unfortunately the outward voyage has not yielded any result, because the rates of 

 the chronometers after the landing could not be determined, as it had been neglected 

 to wind them up. And this accident also takes off much of the value of the home 

 voyage, because through this the difference between the rate at sea and that on 

 land could not be eliminated. Auwers has already made this remark in : Die 

 Venus-Duvchgange 1874 und 1882. Bericht über die Deutschen Beobachtungen, 

 Vol. VI p. 265, and therefore we shall also leave this result out of account. 



2) A. Auwers. Die Venus-Durchgange 1874 und 1882. Bericht über die Deut- 

 schen Beobachtungen Vol VI. 



