A writer in the Cincinnati Gazette takes ground against the theory that cholera is more prevalent in limestone districts than elsewhere, he says: Wherever water is used from wells dug through blue clay or soapstone, the cholera prevails; and where the inhabitants use the cistern water, or use water from wells in neighborhoods where there is no blue clay, they are exempt from cholera. In the little village of Mount Sterling in Switzerland county, 2 1/2 miles back of Vevey, last week, ten persons died of cholera in 48 hours, out of a population of about 100. They used well water dug through blue clay, as I have been informed. As far as my observation has extended, the same rule invariably prevails. If, upon more extended observation, this theory should be confirmed, it will show that it is not the presence of lime in the water that produces cholera, but some other deleterious substance found in water of blue clay districts.