Quarantine.—We understand that quarantine has been established by the oard of health, across Lake Monona, at he point known as Hoboken. Thither it ’ intended that all foreign immigrants hall be landed, and be examined. If anysick, they will have proper care taken1 * /* * * # * : '‘ them. Wo are glad to learu that this ibject is receiving the attention which iculd have been given it some time since.