30 



KNUT LUNDMARK, GLOBULAR CLUSTERS AND SPIRAL NEBULJE. 



With Wirtz one can inquire about the signification of K. The great value, 

 with vvhich it turns out, will hardly be ascribed to a systematic correction of the 

 kind that has been found for the Z?-stars. Rather will the explanation be justified, 

 that we have in this case to do with a systematic motion of spiral nebulae. Yet 

 the nature of this motion is enigmatic, owing to the fact that our determinations 

 consider two groups of spiral nebulse, situated in two regions of the sky opposite to 

 one another, and consequently this would imply, that these groups are both re- 

 ceding from the solar system with a velocity of 660 km 7see« As a matter of course, 

 we can not enter into the interpretation of this peculiar circumstance. Finally we 

 will examine the two groups of nebulse separately. If we thus take into consideration 

 the first seven objects in Table V, we obtain the normal equations: 



7,000 Ä" + 4,748 X + 3,064 Z + 2,334 F= + 1,126 

 4,748 + 3,420 + 2,210 + 1,271 = + 0,602 

 3,064 + 2,210 + 1.805 

 2,334 + 1,271 + 0,532 



1,0000 K + 0,6783 X + 0,4377 Z 



1,0000 X + 0,6633 Z 



1 ,0000 Z 



+ 0,532 =—0.211 

 + 1,778 = + 0,963 



h 0,3334 Y = + 0,1609 

 -1.5678 F = — 0,8141 

 -0,7527 Y== — 1,5878 



K = 0: 



1,0000 F = — 0,3983 



K = + 1,233, V = — 1.929 ± 1,063 

 X =-0,176, A= +66° ± 174° 



F = -0,389, Z)= + 77° ±222° 



Z = — 1,881 



1,0000 X + 0,6462 Z + 0,3716 Y = + 0,1760 



1 ,0000 Z + 0,7666 Y = — 1 ,5915 



1 ,0000 Y = + 0,2574 



X = + 0.982, V Q = — 1 ,725 ± 0,926 



7= + 0,257, ^ = + 15° ±40° 

 Z = - 1,395, Z>= + 54° ±55°. 



-v 



K = 



+ 1233 



v 



K = 

 v 



- 300 km 







132 km 



- 402 km 



+ 316 



+ 



143 



+ 172 



+ 300 



+ 



135 



+ 168 



+ 278 



+ 



298 



+ 446 



- 200 





438 



- 344 



-1020 





157 



- 88 



- 500 



+ 



147 



- 90 



