The number of valuable works concerned more or less directly with a study of the Constitution is very great. Only a very few can be mentioned. A very complete list of references to the Constitution, is that by W.E. Foster, already referred to. The leading works upon Constitutional Law are Cooley's _General Principles of Constitutional Law_, and _Constitutional Limitations_; Von Holst's, Hare's and Pomeroy's treatises on Constitutional Law. Story's _Commentaries on the Constitution_ are invaluable. The character and value of _The Federalist_ have been noticed in the text (p. 25). On Constitutional Amendments, see Johnston's article on _Amendments_ in Lalor's _Encyclopaedia_. Concerning Constitutional developments, due to judicial construction, see Willoughby's _Supreme Court of the United States: its History and Influence in our Constitutional System_, published in the Johns Hopkins Studies, Extra Vol. VII; and _The Constitutional History of the United States as Seen in the Development of American Law_, by Judge Cooley and others, edited by H.W. Rogers. _The Unwritten Constitution of the United States,_ is the title of a very recent book by C.G. Tiedeman. For constitutional development due to war experiences, see Dunning's _United States in Civil War and in Reconstruction_. W.E. Foster has in press a pamphlet of references on _The United States Constitution in Civil War_. On Federal Government, see Jellinek's _Die Lehre von den Staatenverbindungen_; and Hart's _Introduction to the Study of Federal Government_, Harvard Historical Monographs, No. 2. Besides giving an outline of the political history of the successive federations in the world's history, with an account of the literature upon each, Mr. Hart's monograph contains a very excellent bibliographical note on Federal Government in general, and the United States Constitution in particular. The laws of the United States are known as _United States Statutes at Large_. In 1878 was published a large volume containing all Federal laws in force in 1874. In 1881 was published a Supplement (known as _Richardson's Supplement_) containing congressional legislation during the years 1874--1881. Congressional Government. The official reports of the debates of Congress have been published under the following titles: _Annals of Congress_ (1789--1823), _Congressional Debates_ (1824-1837), _Congressional Globe_ (1833-1873), _Congressional Record_ (1873 to the present time). Benton's _Abridgment of Debates_ in 16 volumes covers the period 1789 to 1850.