100 
ASTRONOMY: PEASE AND SHAPLEY 
So far as this analysis goes, -therefore, the axis of symmetry in Messier 
13 appears to be independent of magnitude, length of exposure, and 
distance from the center. It can be located visually on some of the 
photographs of the cluster, particularly in the burned-out central por- 
tion of the longer exposures. 
TABLE ni 
Evidence of Ellipticity in Other Globular Clusters 
CLUSTEK 
6 
I 
DURA- 
TION 
OF 
EXPO- 
SXTRE 
TOTAL NO. 
OF 
STARS 
NXJMBER OF STARS IN SECTORS 
A 
B 
c 
D 
E 
F 
G 
H 
I 
J 
K 
L 
M2 
5 
100.0m 
6,500 
421 
404 
463 
508 
528 
521 
458 
416 
429 
458 
511 
464 
N.G.C. 5024 
102 
180.0 
10,100 
655 
686 
729 
730 
738 
699 
686 
692 
724 
679 
730 
656 
M15 
23 
37.5 
9,000 
343 
344 
350 
322 
338 
318 
336 
410 
374 
313 
320 
329 
24 
94.0 
20,500 
1057 
1068 
1126 
1070 
1056 
982 
1103 
1194 
1158 
1077 
1044 
1076 
25 
312.0 
26,000 
1284 
1357 
1430 
1366 
1354 
1316 
1391 
1446 
1306 
1322 
1311 
1278 
MIO 
117 
60.0 
5,800 
288 
261 
290 
327 
324 
299 
284 
275 
316 
278 
297 
344 
114 
180.0 
12,200 
810 
839 
801 
777 
818 
814 
798 
792 
836 
816 
830 
861 
FIG. 3. AXES OF SYMMETRY IN GLOBULAR CLUSTERS. ORDINATES ARE NUMBERS OF 
STARS; ABSCISSAE ARE ANGLES OF DIRECTION. 
