(5) Clough, H. W. "Synchronous Variations in Solar and Terrestrial Phenomena," Astrophysical Journal, XXII (1905), 42-75.
(6) Clayton, H. H. "Influence of Rainfall on Commerce and Politics," Popular Science Monthly, LX (1901-2), 158-65.
(7) Mitchell, Wesley C. Business Cycles. Berkeley, Cal., 1913.
(8) Moore, Henry L. Economic Cycles: Their Law and Cause. New York, 1914.
(9) Hurry, Jamieson B. Vicious Circles in Sociology and Their Treatment. London, 1915.
(10) Thiers, Adolphe. The Mississippi Bubble. A memoir of John Law. To which are added authentic accounts of the Darien expedition and the South Sea scheme. Translated from the French by F. S. Fiske. New York, 1859.
(11) Wiston-Glynn, A. W. John Law of Lauriston. Financier and statesman, founder of the Bank of France, originator of the Mississippi scheme, etc. London, 1907.
(12) Mackay, Charles. Memoirs of Extraordinary Popular Delusions and the Madness of Crowds. 2 vols. in one. London, 1859. [Vol. I, the Mississippi scheme, the South Sea bubble, the tulipomania, the alchymists, modern prophecies, fortune-telling, the magnetisers, influence of politics and religion on the hair and beard. Vol. II, the crusades, the witch mania, the slow prisoners, haunted houses, popular follies of great cities, popular admiration of great thieves, duels and ordeals, relics.]