74 KNUT LUNDMARK, GLOBULAR CLUSTERS AND SPIRAL NEBCL^. 



-Appendix. 



During the tiine that has passed since the present investigation was elaborated, 

 I have continued my studies on the same subject. The results will be published 

 this year as an »Ergänzungsheft» to the Astronomische Nachrichten. 



In a preliminary notice we will here communicate some of the more important 

 results. 



§ 1. 



The relative parallaxes of the globular clusters have been determined also with 

 aid of other data than the apparent diameter as an equivalent of distance. Thus I 

 have for this purpose compiled, and, where possible, collected by observations of my 

 own, new data regarding the står number, total magnitude, maximal magnitude, 

 visual and photographic diameter &c, of the globular clusters. The diameters of 

 the greater clusters it has been possible to define strictly with aid of the curves of 

 von Zetpel 260 , giving the relation between the distance from the center of the 

 duster and the står density, determined from photographic plates. 



In this respect I have made extensive use of a copy of the Harvard Sky, be- 

 longing to the Lund Observatory. I beg here to express my thanks to Professor 

 Charlier for the benevolence with which he has placed the plates at my disposal. 



The new parallax-values generally confirm the values of Shapley and those 

 derived above by the present writer. The absolute parallax-values found by us also 

 have gained confirmation, especially by a comparison between Shapley's values for 

 w?25 and the absolute magnitude of the red giants of our stellar system, derived as 

 well from direct parallax-measurements as from Adams' and Joy's spectroscopical 

 parallaxes. 



§ 2. 



With the publication in Shapley's 14th paper of radial velocities of spirals, de- 

 termined by Slipher during the last years, there are presently at hand such values 

 for 29 spirals. A determination of the Apex of solar motion by means of the method 

 used in Section II have given the following results: 



