3. The treatment of such subjects as Parcel Post, 4. The explanations of illustrative examples, which set forth in correct form the logical steps leading to results, and which are designed to induce correct habits of thought and orderly arrangement of work. 5. The treatment of Negotiable Paper and Banking, in which are found photographic forms of business papers 6. The extensive treatment of Mensuration and the method employed of deriving most of the important prin- 9. The omission of subjects and problems which are obsolete, overcomplex, and impracticable. |