Author (H. Ziegler) - a well-known Swiss scientist in the field of stability of elastic systems. Such classical concepts as the Ziegler pendulum and the Ziegler paradox (features of the effect of damping on the stability of non-conservative systems) are named after him. In his book, he applies a single method for investigating diverse stability problems using a detailed classification of mechanical systems. This approach allows you to identify analogies and relationships between phenomena such as bulging of the rod, reaching the critical speed of the shaft, etc.