120 THE AMERICAN MIDLAND NATURALIST. 
FIGURE 10. 
A spiral nebula in the constellation Pegasi, in which the arms are 
remarkably distinct and very slightly coiled. This nebula is very much 
like the supposed solar system nebula would have been in its early 
stages, before the arms coiled closely.» Compare this nebula with the 
one shown in Figure 5. From Chamberlin, University of Chicago Press. 
