R. E. Browne—Becker’s Theory of Faulting. 351 
‘supposition the pressure per anit of area of each parting will be 
the same.* If the plates were thoroughly flexible, and if the 
pressure were applied on a limited zone parallel to the croppings 
; creat as that of a singleslip. If : blunt 
‘edge, such as that of a ruler,{ be now applied at right angles to 
the longer dimension of the slips, close to the weight, with a light 
pressure, and be drawn away from the weight a fraction of an 
Inch, a slight relative movement will be perceptible. If this 
application of energy to the system be repeated a score of times, 
ia ., 
~ Lat? 
If the above directions are followed, the pressure applied 
with the ruler being made sufficient, a curve will be produced ; 
but it is significant that a blunt edged tool is used for the pur- 
pose. If ‘the pressure per unit of area of each parting” is to 
even approximately the same throughout each parting, why 
not distribute the weight uniformly over the,upper slip, fasten 
the same, and move the weight? By proceeding in sucha 
manner the result will be simply that illustrated in fig. 2. 
etc. 
¥ 
* See foot note page 349. ; 
+ If it is meant that the pressure per unit of area of each parting would be the 
me, the first sheet should have been made absolutely: rigid, and not * thor- 
e, 
tance from the “limited zone” increases. See page 353. : 
The pressure under the weight might be considered as approximately constant 
and even as distributed approximately over the same area at each parting; but 
not so with the pressure under the blunt-edged ruler. 
, 
