no 



RESEARCHES CONCERNING THE PERIODICAL 



Table VI. 



Explanation of the Nomenclature. 



Right ascension of tiie convergent point, 



Declination, 



Longitude, 



Latitude, 



Longitude of the sun, 



" " earth, 



" " observer's true direction in space, 



Latitude, • 



Elongation of the convergent point from the point [L B], 



Deflection of the convergent point, from antipode of [L B] := 4 — 180 



Second's velocity in geographical miles, of observer's mean motion, . 



" «' " true motion at date, 



" " of meteor's mean rel. mot., Table I., . 



" " of relative motion in half yearly period, 



«' " " yearly " 



Factor to convert K into parts of the Gaussian constant, {k = 0.0172021.) 



True mean normal velocity, 



Mean relative second's velocity of meteors (in parts of /c) = - 



Maximum do. in periodical o rbit, . . . . 



Elliptic Elements derived from mean values of 5,, x, and /S, in the fore- 

 going portion of the table. 



Semi-axis major in parts of the earth's mean distance, 



Epoch for January 1st, preceding, 



Ascending node, 



Longitude of perihelion, 



Inclination from 0^ to 180^, 



Mean daily motion, 



Angle of eccentricity, . . • • 



Period in parts of siderial year, 



G 



K 

 K, 

 Ku 



1 



t 

 N 



y 



1833. 



November. 



12d.734. 



1840. 

 August. 

 9d.'456. 



a 

 H 



i 

 n 



"^ 1 

 a 2 



329° .3 



— 20 .7 

 324 .2 



- 7 .7 

 230 .9 



50 .9 



142 .2 



-f- .2 



172 .2 



7 .8 



16m.459 



16 .7 



18 .3 



27 .1 



33 .0 



.06076 

 2D1.3 



1 .112 



39 .7 



Elements. 



^0~502" 

 74° .2 



230 .9 



231 .0 

 121 .1 



2 .77 

 76 .2 

 .356 



216°.l 

 55 .8 



234 .4 

 ■ 38 .8 



137 .5 



317 .5 



47 .9 



. .1 



140 .6 

 39 .4 



16 .4 



12 .7 

 25.2 



lOni.4 



33 .3 



Elements. 



.686 

 28°.5 



137.5 



144.2 



78.9 



1 .73 

 29 .2 



0.568 



From this table it appears that a half yearly period, as originally proposed 

 by Mr. Olmsted, or a yearly period as since maintained by Olmsted and 

 Boguslawski, for the November meteors, or in other words, the anniversary 

 return of a single cluster of these asteroids, cannot be reconciled with Twining's 

 computed value of their relative velocity, nor with the mean result in Quetelet's 

 table of these velocities, nor with Olbers' remark concerning Boguslawski's 

 computations of the relative velocity of the meteors of November 13th, 1836. 

 Hence, notwithstanding the able arguments adduced by Boguslawski, in favour 

 of the hypothesis of a single cluster, with annual returns for these meteors, the 

 above objection seems insurmountable, and we are compelled to resort to one 

 of the two hypotheses already stated, namely, that of the earth's accidental co- 

 incidence in position, with remarkable clusters in 1799, 1832, and 1833, and of 

 a promiscuous character of the motions and orbits of the individuals composing 



