GEOGRAPHICAL SITUATIONS. 363 



The observation at Berlin is also very advantageous in ascer- 

 taining the latitude of the moon; the north apparent latitude of 

 the moon at the moment of the end of the eclipse, from the 

 tables =30' 20", and the sum of the semidiameters( — 3",9 in- 

 flexion and irradiatton)=32' 13",3. 



The longitude of Berlin deduced from the comparison of 

 many eclipses and occuitations, I make 44' 09", 5 east of Paris, 

 which differs only half a second from the Connoisance de 

 temps. 



h l u 



The time of conjunction at Paris is known by other observations =4 30 12,12 mem time 



With these elements there is a correction in the latitude of the C =-(- 2,0 

 By the distance of centers observed at the Island of Leon at the 



greatest obscuration + 6,0 



By the determination above -j- 3, J 



Mean correction to the latitude in the tables. ....-}- 3,8 

 Hence the latitude of the moon at the conjunction was . . 19 23,1 N 



Conjunction at Paris by the observations at Montauban and the 



Island of Leon at. • . 4 30 10,8 



By the mean result, page 296. . 4 30 12,6 



The longitudes in page 297 are exact, because an error of 

 6" in the latitude of the moon, has no influence on the results. 



The calculations being applied to the observations of Kinder- 

 hook, with the correction of + 3",8 of the latitude in the ta- 

 bles we have, 



Irradiation of the semidiameter of the sun. . . . = — 2", 2 

 Inflexion of the seriiidiameter of the moon. . . . = — 1 ,6 



By the observations, where the total darkness was momen- 

 tary, the same results are obtained, which only differ 00",27 

 from the determinations in page 298. 



With the corrections of the tables, determined as above, I 

 have determined the longitude of Havanna, by the observa- 

 tions of this eclipse = 5 h 39' 02" west of Paris. 



Note to page 275. 



In line 26, for ©= V 48 "' 16 X6",8= 2»,6 read = r *a"^X£±*',6 



4 49 30 4' 3?" 



I would not pretend to give any importance to the supposi- 

 tion that the illumination of the lunar disk, proceeds from the 

 irradiation of the sun, which undoubtedly is not very probable. 

 Neither can it be attributed to the lunar atmosphere. The eye 

 of the observer is affected by the double horizontal refraction 



