As a result of the trial reading of commencement parts held in Sanders Theatre yesterday, the following Seniors have been chosen to speak on Commencement Day: Godfrey Dewey, of Lake Placid Club, N. Y.; Hans von Kaltenborn, of Madison, Wis.; Sidney Fiske Kimball, of Dorchester; and Fletcher Nichols Robinson, of Southern Pines, N. C. Palfrey Perkins 3D., of Salem, has been assigned to a commencement part from the Divinity School.