WE are glad to learn that, owing to the decrease of fever in Boston and New York, the quarantine regulations are now suspended there– this argues well for the sanitory regulations put in force by the Americans during the fearful contagion that so lately visited them. Since last week there has been no quarantine observed on passengers at Liverpool. Of course this does not include Quebec and the ports of British North America, where for the want of such timely precautions as the authorities of the State insisted upon, such gross mortality now prevails.