I. THE PROBLEM PRESENTED.

amplification, believing that the busy men of affairs, to whom a practical knowledge of the subjects herein treated is most essential, have, as a rule, no leisure for the extended study which the volumes into which the present one might easily be expanded would require. He trusts, however, that brevity will not be found wholly incompatible with thoroughness; and that the fact that much which might have properly been included in the book is omitted, will not be taken as a necessary indication that the conclusions arrived at are without value.