We may recall Francis A.Walker's comparison of the economist's task with that of the chemist, which task, in a certain case, was to analyze the contents of a vial of prussic acid, not to give advice as to the use to make of it.

Accordingly, in the following pages, the author has endeavored primarily to develop the economic aspects of each problem, and has repeatedly given warning when the discussion or the conclusions began to transcend strict economic limits.

In many questions feeling is nine-tenths of reason.

If the reader has different social sympathies he may prefer to draw different conclusions from the economic analysis.
The outlook and sympathies that are expressed or tacitly assumed throughout this work are not so much those personal to the author as they are those of our present day American democratic society, taken at about its center of gravity.

When the people generally feel differently as to the ends to be attained, a different public policy must be formulated, tho the economic analysis may not need to be changed.