48 ON THE ORBIT AND PHENOMENA 



NOTES ON THE FOREGOING TABLES. 



No. 3. Assumed azimuth S. 76° 46^' E. 



No. 5. The observer says that the meteor "passed between the Guards (/3 and y) of Ursa Minor." 

 The altitude of ^ at the time was 63° 13' 55", and its azimuth N. 15° 42' 32" W. The altitude of 

 y was 56° 49' 1", and its azimuth N. 15° 51' 45" W. The meteor, according to calculation, passed 

 42' 8" above the former, and 2° 49' 28" below the latter ; being in a direct line between the two 

 at about the azimuth given in the text. 



No. 6. Time by observation g"" 30". 



No. 7. Time by observation g"" 45™. 



No. 8. At the altitude of a Lyrte (77° 29' 46") the calculated azimuth of the meteor's centre is 

 S. 76° 53' E., which gives for its distance from that star about 3^'; so that if the apparent semi- 

 diameter of the meteor exceeded 3i' it occulted the star. 



No. 9. At the observed altitude (77° 2') the calculated azimuth is S. 78° 39' 9" E., which gives 

 14' 39" E. as the angular distance between the observed and calculated positions of the meteor. 



No. 10. Assumed azimuth, due east. 



No. 12. Time by observation 9^ 44°. 



No. 18. The meteor was observed to pass "very nearly in the line of the two lowest bright stars 

 of Cassiopeia" (5 and t), "if anything different, perhaps a little below them." The geocentric altitude 

 of f at the time was 22° 44' 51." 



No. 19. Assumed azimuth N. 30° E. 



No. 20. Assumed azimuth S. 31° W. 



No. 21. See No. 18. Geocentric altitude of 5 Cassiopeias 23° 0' 59." 



No. 24. The meteor was observed to pass near Arcturus, "probably a trifle below." Geocentric 

 altitude of Arcturus 39° 18' 15". 



No. 25. Passed "through the constellation Scorpio, probably a little below Antares." Geocentric 

 altitude of Antares 18° 34' 24". 



No. 26. "Passed just south of the zenith." 



No. 27. Passed "through the constellation Bootes, a little south of Arcturus," whose altitude was 

 39° 13' 16", and azimuth S. 82° 36' "W. Hence, at the point of nearest approach, the distance 

 -between the meteor and the star was 6° 47.' 



No. 30. Passed "near the zenith, if anything a little north." 



No. 34. Passed "about 2° or 3° below Antares," whose altitude was 14° 28' 49" — say 14° 29' 



from which deduct 2^°, and we have the results given in the text. 



No. 44. In making the calculations for this observation the latitude and longitude of Alexandria 

 were used, the exact geographical position of the observer not being known. 



No. 59. The azimuth, when the altitude was a maximum, was about N. 15° E. 



No. 64. Time by observation g"" 40" to S"" 45"". 



No. 66. Time by observation "about g"" 50°." 



No. 68. Tiipe by observation "about half-past nine." Another observer says the meteor dis- 

 appeared in the east at g"" 35"". 



No. 73. The meteor "burst into view in the constellation Ursa Major below the dipper." Geo- 

 centric altitude of p Ursse Majoris, the lowest star of the "dipper," 31° 31' 49". 



No. 76(a). Time by observation g"" 20™. 



No. 79. Assumed azimuth for maximum altitude S. 20° W. 



No. 84. Assumed azimuth due east. In order to satisfy the observation of the altitude, the 

 azimuth must be a little south of east. 



No. 92. "Or perhaps a little less." 



No. 93. The altitude at this azimuth was somewhat conjectural on the part of the observer, as he 

 did not see the meteor till it was some 10° further east. 



No. ge. This azimuth is assumed from the statement of the observer that the meteor was "at right 

 angles to his position." 



No. 101. Assumed azimuth for maximum altitude. 



No. 118. Time by observation g"" 30™. 



