eee eeas Cea Mw PN ree 
H. A. Newton on November Star-Showers. 57 
, or K, having perhaps meanwhile de- ® 
: , 
the distances N A, AB, BC, &, being 
arcs of the orbit described in equal 
times. The length of the group must be at least two and one- 
fourth times the distance NA, since a shower may occur during 
@ period of at least two and one-fourth years; 
Now it is evident that NA is ;,!5; th part of the whole orbit, 
For, after a complete cycle, the group must be near N when the 
earth is there; and the series of points A, B, C, &., cannot go 
More than once around the orbit in one cycle without causing 
more than one period in each 33°25 years. 
11. The number of complete revolutions in 4 year cannot ex- 
ceed two. For an orbit whose periodic time is + has a major 
axis a(4)8, which is less than unity, or less than the distance from 
the sun to the earth. In one year, then, the group must describe 
either 2+ 5.1.5, 0r 1+ ss's5) OF gz'zz Fevolutions. 
_ 12. These five velocities are not all epee probable. Some 
of the members of the group that visited us last November 
: the central point 
of the region from which the paths diverge. Mr. G. A. Nolen 
found its longitude to be 142°, and its latitude 8° 30’. This lon. 
