HIND.— -ASTRONOMICAL DATA. 



In the case of the eclipse of 1876, March 25, the computation 

 is then as follows : — 



Constant -0-19595 

 sin/ +9-99570 



No. 



0-19165 

 • 1 • 55472 



Constant +9-95510 

 cos/ +9-14633 

 cosA +9-96181 



Constant -3-57030 



sin u +9-97552 



-3-54582 



> 



+ 9-06324 



No. 



+ 0-11567 



Constant 



+ 1-11253 





+ 1-22820 





-1-55472 



cos CO 



-0-32652 



or log. cos CO 



-9-51391 



(a 



+ 109° 3-5' 



Constant 



+ 3-52333 



sin / 



+ 9-99570 





+ 3-51903 



\ 



Constant 



A 



Constant 

 B 



Constant 

 cos/ 

 cosB 



- 60 0*0 

 + 36 19-4 



- 23 40-6 



- 60 0-0 

 -150 2-0 

 210 2-0 



-3-76690 

 + 9-14633 

 -9-93738 



No. -3514-2^ 



No. +3303-9* 



No. 



+ 2-85061 



+ 708- 

 + 3303 



9" 

 -9 



+ 4012 

 - 3514 



-8 

 -2 



+ 498 



-6 



H. M. 



+ 8 

 8 3 



s. 

 19 

 50 



8 12 

 4 



9 

 



CO =109 4 



Constant = 29 45 



Angle from N. Point 1 _iqq An 



at first contact. J - ■l<>«5 ^-^ 



or 

 Constant 



Subtract Long. 

 Local time of commencement 4 12 9 

 which agrees with the direct calculation. 



OCCULTATIONS. 



The list appended includes those stars of the Nautical Almanac 

 catalogue, which may possibly be occulted in 82° of north lati- 

 tude ; but in order to ascertain with certainty whether any star 

 is occulted, and the circumstances of the occultation, supposing 

 the position of the point where the observation is to be made 

 approximately known, the formuliE given at p. 134 of Appendices^ 

 &c., cited above, may be employed. An example of the applica- 

 tion of these formulae for Greenwich is given at p. 145 ; but to 

 further illustrate the method of computation, the occultation of 

 the planet Mars 1876, January 31, is here calculated for longi- 

 tude 4"^ West, latitude 82°. 



The following are the circumstances for this position of the 

 principal occultations visible in 1876 and 1877. 







' Immersion. 



Emersion. 









H. 



M. o 



n. M. 



Q 



Mars - 1876, Jan. 30- 



-31 



23 



36 86 



28 



333 



Venus - „ Oct. 13 





4 



4 12 



4 40 



294 



Kegulus „ Dec. 6 





1 



57 50 



2 47 



262 



1877, Jan. 2 





9 



52 70 



10 46 



240 



„ Jan. 29 





21 



22 141 



21 35 



169 



„ Feb. 26 





8 



10 95 



8 57 



214 



The above are local mean times, and the angles from N. point 

 are reckoned as usual in the Nautical Almanac. 



Nautical Almanac. Office, J- ^- ^^^p. 



1875, February 10. 



