..., a doctrine of analysis, a work on solid geometry and figurate numbers and, possibly, the discovery of the sine law of refraction. Discusses the relationship between deduction and intuition, Descartes's doctrine of cognition and that of the Stoics, and Descartes's doctrine of clarity and distinctness...

... in the development of optical science in the seventeenth century. He considered his optical theories to be a break from the Scholastic tradition and developed an explanation of light and vision that was strictly mechanistic. Until the time of Newton and Huygens, Hobbes’s sine law of refraction was the only...