This book presents the second volume of Piolaâs original Italian text together with the English-language translation and comments, showing convincingly that Gabrio Piolaâs work must still be regarded as a modern theory. Gabrio Piolaâs work has had an enormous impact on the development of applied mathematics and continuum mechanics. As such, a committee of scientific experts took it upon themselves to translate his complete works. In a second step, they commented on Piolaâs work and compared it to modern theories in mechanics in order to stress Piolaâs impact on modern science and prove and confirm that he achieved significant milestones in applied mathematics.