Discourses on various subjects : read before literary and philosophical societies

Online version:

On the mutual relations of the sciences.-On the mammoth, or fossil elephant, discovered at the mouth of the Lena.-On the changes which have taken place in the English language, especially during the three last centuries.-On the science of political economy.-On the last reformation of the calendar in England.-On the general principles of physical investigation.-On the mechanical causes of thunder.-On the paradoxes of vision.-On the theory of wit