352 R. E. Browne—- Becker's T. heory of Faulting. 
Mr. Becker’s experiment in no sense, “forms a check upow 
the theory,” since it deals with fundamentally different condi- 
tions. The fact is, the formation of this curve, in the experi- 
ment described, is due mainly to the inequality of the “ pressure 
rithmic curves to the Sutro Tunnel section. The fact that a 
carefully selected section of a natural surface may be approxi- 
mately covered with portions of such curves, when calculated 
by the method adopted, is of little import. Doubtless many 
other simple curves might have proved equally serviceable. 
However, this question will not be discussed at present. 
An Explanation of the Formation of the Curve in the Experi- 
ment with the Slips of Paper.—A B (tig. 8) represents an elastic 
sheet resting upon an incompres- 
ase, and W a toothed cylin- 
There is frictional resist- 
* Referring to the Comstock country. 
