Letters on the Cholera Morbus.Containing ample evidence that this disease, under whatevername known, cannot be transmitted from the persons of thoselabouring under it to other individuals, by contact—throughthe medium of inanimate substances—or through the mediumof the atmosphere; and that all restrictions, by cordonsand quarantine regulations, are, as far as regards thisdisease, not merely useless, but highly injurious to thecommunity.