Cyclopaedia of Political Science, Political Economy 3 vols.
A massive 3 volume, 3,000 page compendium of nearly every aspect of 19th century American economics and political institutions. An additional bonus are the numerous translation of articles written for the French-language Dictionnaire de l’économie politique (1852-53. It was first published in 1881-84. The main contributors, with 10 or more articles each, are the following: Alexander Johnston (293), Maurice Block (85), Charles Coquelin (23), A.R. Spofford (20), J.C. Bluntschli (17), Joseph Garnier (15), Ambroise Clément (13), John W. Clampitt (12), J. R. McCulloch (11), Jules Simon (10), and E. J. James (10). See a full table of contents here.
Cyclopaedia of Political Science, Political Economy, and of the Political History of the United States by the best American and European Authors, ed. John J. Lalor (New York: Maynard, Merrill, & Co., 1899). 3 vols.
The text is in the public domain.