Letters on the Cholera Morbus. - Containing ample evidence that this disease, under whatever - name known, cannot be transmitted from the persons of those - labouring under it to other individuals, by contact—through - the medium of inanimate substances—or through the medium - of the atmosphere; and that all restrictions, by cordons - and quarantine regulations, are, as far as regards this - disease, not merely useless, but highly injurious to the - community.