March 13, 1907. April 3, 1908. Present: KNOWLTON, C.J., MORTON, HAMMOND, LORING, BRALEY, SHELDON, RUGG, JJ. Unlawful Interference. Labor Union. Strike. Equity Pleading and Practice, Parties. The legality of a combination not to work for an employer, made by persons who are not under contract to work for him, depends on the purpose for which the combination is formed. A combination not to work for an employer, made by persons who are under contract to work for him in violation of that contract, is