244 A, C. Twining on Meteoric Rings as 
Art. XXVI.—Investigations respecting the Phenomena of Meteoric 
Rings, as affected by the Earth ; by ALEXANDER OC. TWINING. 
ring: educible by analysis, as a cosmical effect, from the planet- 
influences. This latter enquiry however, although I thus 
state it in full, covers it will be seen, a vastly greater area than 
all which lies within the present purpose and discussion. A me- 
teoric ring is, of course, the subject of influence from : 
planets, through their entire revolutions. But these uninterm 
ting influences of the general system are clearly distinguisaar 
from the special and immediate effects and results of the Ha hs 
the mary constitution of the ring, yet, for convenience, we 
teoric orbits are supposed primarily all parallel, one to anh” 
in the parts at and near the nodes on the ecliptic ¢c¢; oe 
position which includes, as a consequence, the mutual inters?© 
of t orbits in or near a line passing through Sand eet 
mal to the mean line of nodes Snt. ‘Let Bt, E/’ be tangent * 
the exterior and interior bounding circles of Eee, and let ™ 
_ be meteors which if undisturbed by the earth, would find the 
oe 
