520 



SCIENCE 



[N. S. Vol. XLV, No. 1169 



Southern HemisiAere. Nortliern Hemisphere. 



Fig. 8. Distribution of Nebulse and Star Clusters according to Proctor. Nebulas are marked by dots; 



clusters by crosses. 



Path's photographs, covering very small of the diagram. The distribution of the 



areas in the centers of 139 regions, recorded nebulte is seen to be irregular and patchy, 



nebulse hitherto undiscovered in the num- but the fact is indisputable that the faint 



bers set down in his chart, reproduced in nebulm discovered with the most powerful 



Fig. 9. Distribution of Faint Nebulas discovered by Fath 

 at Mount Wilson. 



Fig. 9. The curve drawn across the chart photographic telescopes in the world, like 



represents the central line of the Galaxy, the brighter nebulas discovered visually by 



The north pole of the Galaxy is at N, and the Herschels and others, abhor the Milky 



the south pole is near S at the lower edge Way. In the northern hemisphere, as 



