112 THE AMERICAN MIDLAND NATURALIST. 
FIGURE 1. 
A 
Diagram of the supposed earth-moon stage of the Laplacian hypo- 
thesis. 1 is the central mass which is to form the earth, and 2 the ring 
which supposedly condensed into. a ball and became the moon. 
B 
The earth on the Laplacian hypothesis. The heavy black portion 
.represents the supposed solid “crust”; the lined dise represents the 
“molten interior.” 
