Fig. 41. — Regular Shaped Nebula (X.G.C. 5866) with Band of 



Dark Matter on Equator. 



Fig. 42. — Spiral Nebula in Ursa Major (M. ioi). 



Reproduced by kind permission from an article on " The Origin of the Solar 

 System," by Dr J. H. Jeans in Nature, 1st March 1924. 



[To/acepagie 300 



