Letters From James Gregory Of Edinburgh: In Defense Of His Essay On The Relation Between Motive And Action And That Of Cause And Effect In Physics (1819) is a collection of letters written by James Gregory, a Scottish mathematician and astronomer, in defense of his essay on the relationship between motive and action and cause and effect in physics. The book was originally published in 1819 and includes letters addressed to various individuals, including philosophers and scientists, who had criticized Gregory's essay. In these letters, Gregory defends his ideas and argues for the importance of understanding the relationship between motive and action in order to fully understand the laws of physics. The book provides an interesting insight into the debates surrounding the nature of causality and the relationship between the physical and mental realms in the early 19th century.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.