"Die Methode macht alles aus." This is a well-written account of the development of two important categories of technique. Doby has correctly implied that the intravascular manipulation incident to angiography such as cardiac catheterization is equal in importance to angiography itself. He traces methods that observe appearance or function of the interior of the cardiovascular system, from Hippocrates and Galen to our present time. The development of our knowledge of the vascular system is thus documented in a scholarly fashion.
Angiography, as we know it, awaited the clinical application of Roentgen's discovery. Except for sporadic attempts, the interior of the blood vessels and of the heart were not visualized until the 1920s and 1930s, after the techniques for most of the other organ systems had been well standardized.
It is remarkable to find in so scholarly a work such warm and lively portrayals of the people involved in this work—their