XIV 



Contents 



31. Electronic Computers 571 



/. Need for High Speed Computation, 571; 2. Analog and Digital 

 Computers, 572; 3. A Bone-Density Analog Computer, 573; 

 4. Curve Fitters, bll \ 5. Digital Computers, 580 



Appendices 



A. Auditory Acoustics, 589 



B. Geometrical Optics, 595 



C. Electrical Terminology {Used in Chapters 4 through 7), 605 



D. Ionizing Radiations, 610 



Index 615 



