350 R. E. Browne—Becker’s Theory of Faulting. 
members of a series of sheets W, P,, Ps, Ps, . . of in- 
definite number, then each sheet which moves ; will communi- 
cate a certain amount of energy to the next, and since the 
resistance of friction* is proportional to the distance through 
which it 6 pte sheet which receives energy from its prede- 
cessor must 1m 
In other eset “each such sheet must be translated. Herein 
lies the misconception. the resistance, which a given sheet 
P; offers to motion, is greater than the Bees op it causes to 
the motion of its predecessor P,, it will remain at rest; and 
though it receives energy from its ast paola this energy is in 
the form of heat and will not cause suena of P,. 
Now follows this statement: “ e the sheets are in all 
respects alike and the pressure at si Sees is the same, the 
fr cate resistance or negative force at each contact will ‘also 
ete.” 
and to say that it could be rea approxi scuuaaly wind but 
ior a misunderstanding of the ee Any small differ- 
ence between the surfaces of contact, of a nature to influence 
friction, would change the character. of the problem. There 
would be one contact where the frictional resistance would be 
less than at the other oe and here only would there occur 
a dislocation. If the condition should nevertheless be enter- 
tained, there would, owing to the inertia of P,, result a disloca- 
tion at the first contact W Py. The sheets P,, Ps, Pa - +++ * 
would all remain at rest, though in unstable equilibrium. 
In the real question at issue, 
i then, if the contact between Ps 
and P, offers less resistance yoan 
the other contacts, motion 0 
will ray produce the effect 
shown in fig. 2, and not the 
effect claimed by Mr. Becker and 
shown in fig. 
It would be pur poseless to fol- 
low the mathematical develop- 
ments erratically based upod 
this misconception of the main 
question involved. uffice it 
to say that a logarithmic equa 
tion is saaehad to represent the 
supposed curve. However, some comment upon the “experi: 
mental verification” will not be out of place. Under this 
heading the author says: 
* Probably “ work of friction” is meant. 
