The Principles of Osteopathic Technique
A. S. Hollis, D.O.
1914

FIGURE 42
 

Fig. I.  Diagram showing a normal dorsal vertebra with attached ribs.
Fig. II.  Diagram showing the prominence of the ribs produced by the rotary twist of the vertebrae.
Fig. III.  Diagram showing the principle used in testing for movement between individual vertebrae, and also in directly establishing such movement.