Indice: Foreword: The historical epistemology of mechanics / Jürgen Renn. Introduction. Pt. 1. War and practice: 1. Artist-engineers' apprenticeship and Galileo 2. Instruments and machines 3. Galileo's private course on fortifications. Pt. 2. Practice and science: 4. The knowledge of the Venetian arsenal 5. Pneumatics, the thermoscope and the new atomistic conception of heat. Pt. 3. The engineer and the scientist: 6. Was Galileo an engineer?. Sources: Galileo's correspondence. Credits. References. Name index. Illustration index