ON THE SOLUTIONS OF THE DIFFERENTIAL EQUATIONS OF MOTION OF A DOUBLE PENDULUM by Cederberg, William E. Ph.D - 1923

Rock Island, Illinois: Augustana Book Concern, 1923. Augustana Library Publications. Number 9. "In this discussion we are dealing with a double pendulum which is swinging freely in a vertical plane through small angles about its position of stable equilibrium. The solutions of the differential equations of motion of this pendulum have been found by means of a well-known theorem of Poincare, which for the present purpose may be stated briefly as follows..." 62 pp. Photograph of Denkmann Memorial Library, Ausustana College, Rock Island, Ill.Each page with equations. Stiff grey covers. ex.mus. stamp on front cover. Slight stain? along part of front cover's bottom edge. Doesn't go through. very minor. Otherwise covers are Very Good. Title page's top corner tip missing. ex.mus. stamp on first page of text along top margin. No interference with text. Otherwise interior is tight, clean and Very Good+. . Paper Cover. Very Good. Illus. by Equations. Size: Approx. 7 1/2" x 10 1/4". Physics.