294 FURTHER OBSERVATIONS ON THE 



• / 



Longitude of the ©'s apparent equinox 84 44 37 2 



Idem. . 2's 84 44 47 8 



North latitude of the 3 00 19 19 3 



Horary relative motion in longitude. . . . . 34 18 5 



Horary motion in latitude, south. . . . . . 3 23 6 



Horizontal equatorial parallax of the 3. . . . 60 15 8 



Idem. . . © 8 6 



„ . . , .,. e .. O • 16 26 85 



Horizontal semidiameter ot the i -. 15 46 04 



Horary increase of the 3>'s parallax. .... • 1 10 



Increase of the 2>'s horary movement. 1 41 



The other elements are the same as those in page 270. 



Comparing the commencement at Madrid, with the com- 

 mencement at the island of Leon, it appears that the observa- 

 tion at Madrid was delayed 7". 



Combining the beginning at the island of Leon with the 

 end observed in Madrid, supposing the sum of the apparent 

 semidiameters diminished 4" 5 for the irradiation, we have the 

 conjunction in Paris mean time 4 h 30' 11" 6. Correction of 

 tables in latitude of the moon=+l()" 9. 



In Boston, latitude 42° 21' 13", longitude west of Paris 

 4° 53' 28", it was observed by three persons with achromatic 

 telescopes, which I shall distinguish by the numbers 1, 2, 3. 



Beginning of End of the 



the Eclipse. Total obscurity. End of obscurity. Eclipse, 



h i it h i i> h i u o ' " 



No. 1. 10 03 21 11 22 31 11 27 09 48 01 



2. . 10 03 21 11 22 31 11 27 09 48 59 



3. 10 03 20 11 22 40 11 27 08 48 07 



The state of the chronometer is not known, because no ob- 

 servations were made to ascertain tbe time, and the only use 

 that can be made of these observations, is to determine the er- 

 ror of the tables in latitude, or, knowing this element, to deter- 

 mine the difference of the semidiameter of the sun and moon. 



I have again examined the corresponding altitudes observed 

 by M. de Witt at Albany, and have determined that 



The commencement of the total obscurity, mean time. . . 11 OS 14 6 

 End. . . ditto. . . . . . 11 13 05 6 



Duration according to M. de Witt. . . ... 4 51 



Applying the calculation to the observations of Kinderhook, 

 supposing the correction of the tables in latitude =+ 10" 9 as 

 it results from the observations of Madrid and the island of Leon. 



We have irradiation of the semidiameter of the 3. . . = — 3' 25 



Idem. . . . 0. ... — 1 25 



