Table of contents : Introduction....Pages 1-16 Continuum mechanics and geometric integration theory....Pages 17-29 Structure of continuum physics....Pages 30-37 On differentiable spaces....Pages 38-42 Cartesian closed categories and analysis of smooth maps....Pages 43-51 Introduction to synthetic differential geometry, and a synthetic theory of dislocations....Pages 52-68 Synthetic reasoning and variable sets....Pages 69-82 Recent research on the foundations of thermodynamics....Pages 83-99 Global and local versions of the second law of thermodynamics....Pages 100-114 Thermodynamics and the hahn-banach theorem....Pages 115-117 What is the length of a potato?....Pages 118-126