In the preparation of this volume constant use has been made of "The Constitution of the United States of America Annotated," which was brought out under the editorship of Mr. W.C. Gilbert in 1938. Its copious listing of cases has been especially valuable. Its admirable Tables of Contents and Index have furnished a model for those of the present volume. If this model has been approximated the contents of this volume ought to be readily accessible despite its size. The coverage of the volume ends with the cases decided June, 1952. A personal word or two must be added. The Editor was invited to undertake this project by Dr. Ernest S. Griffith, Director of the Legislative Reference Service of the Library of Congress, and his constant interest in the progress of our labors has been a tremendous source of encouragement. To his able collaborators the Editor will not attempt to express his appreciation--they share with him the credit for such merits as the work possesses and responsibility for its short comings. And I am sure that they join me in thanking Miss Evelyn K. Mayhugh for her skill and devotion in aiding us at every step in our common task. Edward S. Corwin. INTRODUCTION It is my purpose in this Introduction to the _Constitution of the United States, Annotated_ to sketch rapidly certain outstanding phases of the Supreme Court's interpretation of the Constitution for the illustration they may afford of the interests, ideas, and contingencies which have from time to time influenced the Court in this still supremely important area of its powers and of the comparable factors which give direction to its work in the same field at the present time. As employed in this country, Constitutional Law signifies a body of rules resulting from the interpretation by a high court of a written constitutional instrument in the course of disposing of cases in which the validity, in relation to the constitutional instrument, of some act of governmental power, State or national, has been challenged. This function, conveniently labelled "Judicial Review," involves the power and duty on the part of the Court of pronouncing void any such act which does not square with its own reading of the constitutional instrument. Theoretically, therefore, it is a purely juristic product, and as such does not alter the meaning. To those who hold this theory, the Court does not elaborate the instrument, as legislative power might; it elucidates it, bringing forth into the light of day, as it were, what was in the instrument from the first. In the case of judicial review as exercised by the Supreme Court of the United States in relation to the national Constitution, its preservative character has been at times a theme of enthusiastic encomium, as in the following passage from a speech by the late Chief Justice White, made shortly before he ascended the Bench: