Cosserat also worked on mechanics based on euclidean laws and built into an original and coherent theory. However his work in this area, although important at the time, was overtaken by the theory of relativity and other advances in theoretical physics.
Cosserat din nagtrabaho sa mechanics euclidean batay sa mga batas at nakapaloob sa isang orihinal at magkakaugnay theory. Subalit ang kanyang trabaho sa lugar na ito, kahit na mahalaga sa oras, ay abot ng teorya ng kapamanggitan at iba pang pagsulong sa panteorya physics.