November 13, 1946. Appeal from Workmen's Compensation Board. The award is challenged upon the issue of jurisdiction. It is opposed upon the ground that jurisdiction is exclusively in the United States Employees' Compensation Commission. Deceased was employed as a technician. He was an expert in the modification of crystals in the manufacture of radio, radar and electronic equipment. He acted in an advisory capacity to the superintendents of plants of the employer in the State of New York. The employer