ASTRONOMY: H. SHAPLEY 
347 
in good agreement. It is expected that the measures and computations 
underlying this work and a more complete discussion will appear in 
a Mount Wilson Contribution. 
Positions in Space of Seventy Open Clusters 
N. G. C. 
GALAC- 
TIC 
LONGI- 
TUDE 
PARALLAX 
DISTANCE (unit 
100 PARSECS 
N. G. C. 
GALAC- 
TIC 
LONGI- 
TUDE 
PARALLAX 
DISTANCE (UNIT 
100 PARSECS 
Along 
plane 
From 
plane 
Along 
plane 
From 
plane 
457 
93° 
0.00016 
62 
- 5.3 
2682* 
183° 
0.00025 
34 
+22.0 
663 
97 
0.0002 
50 
- 1.2 
I. C. 2488 
245 
0.0002 : 
43 
- 2.7 
869* 
102 
0.0008 
12 
- 0.9 
3114 
250 
0.001: 
10 
- 0.5 
884* 
103 
0.0008 
12 
- 0.8 
3532t 
257 
0.002: 
4 
+ 0.1 
1039 
111 
0.0006 
17 
- 5.0 
1. C. 2714 
259 
0.0002 
59 
- 1.2 
1245 
114 
0.0002 
44 
- 7.1 
Mel 105 
260 
0.00007 
140 
- 4.7 
Pleiades* 
134 
0.015 
0.6 
- 0.3 
Mel 108 
262 
0.0001 
90 
+10.5 
1528 
119 
0.0004 
24 
0.0 
4349 
267 
0.00025 
40 
+ 1.0 
1807 
154 
0.0002 
42 
- 9.7 
5281 
277 
0.00007 
140 
- 0.4 
1912* 
139 
0.0003 
32 
-f 0.6 
5617 
282 
0.0002 
50 
+ 0.2 
1960* 
142 
0.0002 
48 
+ 1.1 
5823 
289 
0.00015 
67 
+ 3.3 
2099* 
145 
0.0004 
26 
+ 1.5 
5999 
293 
0.0001 
100 
- 3.5 
2168* 
154 
0.0006 : 
18 
+ 0.8 
6005 
293 
0,00006 
160 
- 9.2 
2266 
154 
0.00009 
110 
+20.0 
6067 
297 
0.0002 
45 
- 1.7 
2287 
199 
0.0006 : 
16 
- 2.6 
6124 
308 
0.0005 
21 
+ 2.2 
2323* 
189 
0.0002 
50 
- 0.4 
6134 
302 
0.00014 
71 
- 0.1 
2324 
181 
0.0001 
91 
+ 6.4 
6192 
308 
0.0001 
83 
+ 3.2 
2355 
170 
0.0001 
98 
+22.0 
6222 
309 
0.00007 
140 
- 0.4 
2360 
197 
0.00014 
71 
- 0.8 
6242 
313 
0.00014 
71 
+ 2.8 
2421 
204 
0.0001 
77 
+ 1.2 
6259 
310 
0.0002 
53 
- 1.5 
2420 
165 
0.0001 
94 
+34.0 
I. C. 4651 
308 
0.0002 
50 
- 7.0 
2423 
199 
0.0003 
34 
+ 2.7 
6405* 
324 
0.001: 
8 
- 0.1 
Mel 71 
197 
0.0001 
77 
+ 7.8 
6451 
327 
0.00009 
110 
- 3.9 
2439 
214 
0.0001 
91 
- 5.7 
6475* 
323 
0.003: 
4 
- 0.3 
2437 
200 
0.0005 
21 
+ 1.8 
6494 
338 
0.0005 
21 
+ 0.8 
2447 
208 
0.0002 
43 
+ 1.0 
6520 
330 
0.00009 
110 
- 6.2 
2477 
221 
0.0005 
20 
- 1.8 
6603 
340 
0.00008 
120 
- 3.8 
2489 
214 
0.0001 
100 
+ 0.3 
Mel 204 
341 
0.0006: 
16 
- 1.5 
2506 
198 
0.0001 
98 
+19.0 
6645 
343 
0.0002 
56 
- 4.2 
2516 
241 
0.002: 
6 
- 1.5 
6705* 
355 
0.00014 
71 
- 4.2 
2539 
201 
0.0003 
31 
+ 6.8 
6709 
10 
0.0002 
56 
+ 3.8 
2548 
195 
0.0007: 
14 
+ 4.2 
6834 
33 
0.00008 
120 
+ 0.9 
2567 
217 
0.0001 
83 
+ 5.5 
6838* 
24 
0.00007 
140 
-14.0 
2627 
219 
0.0001 
90 
+12.0 
7654 
80 
0.00016 
62 
- 0.2 
2632* 
172 
0.003: 
25 
+ 1.6 
7789 
83 
0.0003 
37 
- 3.7 
t The bright southern cluster N.G.C. 3532 is conspicuously elliptical. 
The well-known concentration of open clusters in the Milky Way is 
shown by the smallness of the tabular distances from the plane. This 
condition allows a good representation of the distribution in space 
