Scope and Contents 1 Tricuspid valve in mock circulation. Ordinary movie with high-speed factors. 2 Electromotor driven, pendulum type heart in mock circulation. 3 Dog on table with chest closed and solenoid driven heart inside. Its own heart shows mitral valve inside. Cineangiocardiograms of same (Sones, 1959). 4 Seidel and Moulopoulos on NASA time scope. 5 Forty-eight potentiometers. Also, quiet pumping and turbulent pumping. 6 Dog on table waking up...