New York, April 13. - The national Democratie party of New York couiuy held its meeting in Cooper Union Monday night and adopted a plan of organization and issued a cali for primarles to be held May 5.s Corporation Counsel Scott presided. The plan provides for: 1. An assembly district eommittee in each assembly district. 2. A county eommittee. 3. An executive eommittee. 4. A general eommittee.