ASTRONOMY: C. D. PERRINE 
39 
of the same stars which confirm the conclusions from the radial veloci- 
ties. Solutions were made also from Adams' Mount Wilson Hst of 
500 radial velocities^ which show the same dependence. This list, 
however, contains no stars south of —26°. 
The results from both sets of data are given in table I. 
TABLE I 
RADIAL VELOCITIES 
PROPER 
MOTION 
p. M.— R. V. 
CLASS 
A 
D 
No. stars 
A 
D 
AD 
degrees 
degrees 
egrees 
egrees 
de rees 
egrees 
2.9 and brighter. All 
258.0 
+41.5 
110 
258 .8 
+24.6 
— 16.9 
B 
276.0 
+29.6 
193 
272.8 
+32.4 
+ 2.8 
A, F, G 
Large 
268.1 
+ 8.6 
141 
261.3 
+22.1 
+ 13.5 
Medium 
269.0 
+ 7.0 
81 
238.5 
+50.8 
+43.8 
Small 
K 
254.7 
+35.0 
277 
263.5 
+47.4 
+ 12.4 
Large 
288.7 
+ 18.8 
85 
255.9 
+ 13.0 
- 5.8 
Medium 
250.4 
+ 15.1 
85 
258.5 
+42.9 
+27.8 
Small 
260.4 
+36.8 
220 
276.4 
+69.2 
+32.4 
Mean 
265.7 
+24.0 
260.7 
+37.8 
+ 13.8 
Adams' 500 R. V. 
Large 
276.9 
+ 3.1 
47 
279.2 
+38.4 
+35.3 
Medium 
244.2 
+41.6 
32 
249.6 
+50.3 
+ 8.7 
Small 
272.0 
+31.6 
349 
266.4 
+67.7 
+36.1 
These results also show systematic differences between the positions 
of the apex of the kind noted by CampbelP between his apex from 1193 
radial velocities and that of Lewis Boss from 4686 proper motions. 
These discordances are chiefly in declination and are given below accord- 
ing to spectral class in the sense P.M. — R.V. 
SPECTRAL CLASS 
AD 
SPECTRAL CLASS 
A D 
degrees 
degrees 
B 
+ 5.3 
G 
+22.1 
A 
+ 13.0 
K 
+ 14.7 
F 
+ 17.6 
M 
+ 7.1 
There is some indication that the discordance is greater for the later 
spectral types, at least among the stars with small proper motion in 
right ascension, and possibly also some relation to magnitude and size 
of proper motion. 
Asymmetry in the proper motions of the B stars and other peculiari- 
