Prof. P. Lowell on the Tores of Saturn. 469 
in especial being noticeable about halfway from the planet's 
centre to its (the planet's) eastern limb (Nov. 13, 14 h G.M.T.). 
The line also seemed not quite central in the belt but a little 
nearer its northern edge. The sun was now 1° 39 /# 5 south of 
the ring-plane, while the earth was 50' north of it. So that 
both bodies were now again on opposite sides of it, having 
respectively changed across. 
Although seen bv all the observers at Flagstaff, the black 
core was not caught by Barnard at Yerkes, nor has it been 
reported from' the Lick. This, however, is in keeping with the 
definition at the first place disclosed already by its greater 
space penetration for stars. 
The rings themselves were equally visible, in fact were now 
easy objects, although, as before, only the edge of their plane 
was presented to the eye. But, in addition to the general 
line of their light, agglomerations were plainly discernible 
on them, attention being directed to that end. The agglo- 
merations were symmetrically placed, two on either side the 
ball, and continued observation showed them to be permanent 
in position. Micrometric measures were made upon them 
by both Mr. Lampland and by me from November 3rd to 
November 9th. The most complete were those of the latter 
date, which, while agreeing in place with the earlier ones, 
gave not only the centre of the agglomerations but their 
beginning and end in distances from the planet. My 
measures on that evening, with which those of Mr. Lampland 
substantial^ agree, were as follows : — 
November 9, 1907. 15 h 25 m to 15 h 50 m G.M.T 
In equat. radii 
-p In seconds of of Saturn from 
itIOHT. arc from the the Planet's 
Mean of nearer limb. centre. 
3 measures. Inner edge of inner thickening . . l"-00 1*11 
2 „ Outer „ „ „ . . 3"'94 1-43 
2 „ Gap (most conspicuously vacant 5"-36 1-58 
spot). 
3 „ Inner edge of outer thickening. . 6"'92 1-75 
4 „ Outer „ „ „ .. 8"-51 1-92 
Left. 
2 measures. Inner edge of inner thickening . . 1"-15 1-12 
2 „ Outer „ „ „ . . 4"*22 1-46 
5 „ Gap (most conspicuously vacant 5"*58 1*60 
spot). 
3 ,, Inner edge of outer thickening. . 6"*53 1*71 
2 „ Outer „ „ „ .. 8"-46 1-91 
