PARABOLIC ORBITS OF METEOR STREAMS 



471 



TABLE VII. 



Leonid Meteors (1) and 



EXPLANATION OF TABLES. 



Table I. — ^This table contains the dates, intervals, number of meteors 

 seen, etc., for all observations made. The factor colmnn gives an arbi- 

 trary constant for each date which is based on the notes as to condition 

 of skj^ and which is supposed to show the ratio of the meteors seen to 

 what would have been seen on a clear, moonless night. The corrected 

 rate gives this latter estimate. (Rev. E. A. McDonald only counted 

 meteors during the periods of his observations. Therefore his rates per 

 hour should be at least one-third greater than for the others, all of whom 

 plotted and recorded most of the meteors seen.) 



Table II. — This table contains 126 parabolic orbits, the method of their 

 computation being taken from "Die Bahnbestimmung der Himmels- 

 korper" by J. Bauschinger, Chapter 35. The sjTubols used have the fol- 

 lowing meanings: a, 8, V, h' refer to the apparent right ascension, decli- 

 nation, longitude and latitude of the radiant, 1, b to the true longitude 

 and latitude. The elements proper t, q, tt, 2 have the usual significance, 

 that is inclination of orbit plain, perihelion distance, longitude of peri- 

 helion and longitude of ascending node. An auxiliary angle 77 is also given, 

 since it serves as a useful check upon the other elements. Under the 

 'Remarks' column will be found notes calling attention to the confirmation 

 of a given radiant from other sources, especially radiants formerly deter- 

 mined by the author. 



Table III. — These radiants are considered uncertain from various 

 causes, but still as probably existent. Poor projection of maps, too small 

 scale, the radiant being over the edge, poor observation of some of the 



