348 J. LeConte—Formation of the 
d 
avoid the conclusion that they too, if they rest on a liquid 
mass beneath, must be sustained by a s’milar bulge on the lower 
surface of the solid crust. The accompanying diagram (fig 4) 
4. 
mously exaggerated. 
The condition of the solid crust represented by figs. 2 and 4, 
on th 
therefore eae of the thinner portions, viz: 
This difficulty seems to be fatal. 
