122, = @ E. Dutton on the Contractional Hypothesis. 
had been confined to portions underlying the disturbed regions: 
yet if the contraction was general, there must have been a large 
ponents by weakening the supports from which it thrusts 
would have the effect of increasing the intensity of the other 
set of components at right angles to the weakened set. No 
relief could take place unless it be a relief in all directions. 
he case in question is not that of the cylindric arch, but 
nearly that of the dome; and if a collapse is to occur, every 
row for most of the distance, but extremely disturbed through- 
out. If the parallels of latitude perpendicular to this mighty 
