The subjects of Domestic Relations (Subject X in this work), Criminal Law (Subject XXX), Torts (Subject VIII), Real Property (Subject XVII), Personal Property (Subject XIV) and Contracts (Subject VI) have already been referred to. The whole tendency of law has constantly been towards the creation of new branches of the law and the subdivision of old ones. This tendency of subdivision has been particularly active in the field of contracts, where we now have the following clearly defined important subdivisions: Agency (Subject VII), Sales (Subject XI), Bailments (Subject XII), Carriers (Subject XIII), Partnership (Subject XXIII), Private Corporations (Subject XXIV), Bills and Notes (Subject XXVI), Guaranty and Suretyship (Subject XXVII) and Insurance (Subject XXVIII). As off-shoots from the law of Real Property we have Abstracts (Subject XVIII) and Mining Law (Subject XIX), and from the law of Personal Property, Patents (Subject XV) and Copyrights (Subject XVI). The law of Wills (Subject XXXII) treats of the disposal after death of both species of property. As a supplemental system to that of the Comman Law we have Equity Jurisprudence (Subject XX), of which Trusts (Subject XXI) is a subdivision. Under adjective law we find Common Law Pleading (Subject XXXIV), Equity Pleading (Subject XXII), Code Pleading (Subject XXXV), Criminal Procedure (Subject XXXI), Federal Procedure (Subject XXXVI), Evidence (XXXVII), Damages (Subject IX), Administration (Subject XXXIII) and Bankruptcy (Subject XXIX).

In the field of public law it is necessary to consider United States Constitutional Law (Subject III), State Constitutions (Subject IV), Statutory Construction (Subject V) and Public Corporations (Subject XXV), together with International Law, both Public (Subject XXXVIII) and Private (Subject XXXIX). Other subjects treated in this series of volumes are Legal History (Subject II), Spanish-American Law (Subject XL) and Legal Ethics (Subject XLI).