Against the Boycott.—The United States Supreme Court has handed down a decision which is certainly a blow to unionism, and that decision is in substance that boycotting is illegal, a violation of the Sherman anti-trust law, and punishable by a fine, that the discrimination against dealers is in restraint of trade. It came in a case brought by Mr. Low, a hat manufacturer of Danbury, Conn., whose factory was boycotted. The only hope now, evidently, is to amend the law.