Book Review Naples in the Time of Cholera, 1884 –1911 By Frank M. Snowden. 478 pp. New York, Cambridge University Press, 1996. $59.95. 0-521-48310-7 Cholera in Post-Revolutionary Paris: A cultural history (Studies on the History of Science and Culture. Vol. 25.) By Catherine Kudlick. 293 pp. Berkeley, Calif., University of California Press, 1996. $40. 0-520-20273-2