6 INDUSTRIAL REVOLUTION AND WAGES 
lications also contain important statistical information. 
The discussion of tendencies and the offering of construct- 
ive suggestions have thus far been confined to the business 
and financial press, and to addresses by industrial leaders 
and public officials. 
Finally, in the course of the present work, the method 
which has been adopted in discussing the changes which 
have occurred in wage theories and principles, has not, as 
a rule, been to enter into a critical examination of theories 
put forward, but rather to state merely the reasons ad- 
vanced in their support and to point out the extent to 
which changes have been sanctioned and applied.