Abstract
The study of Jean Cohen’s work as a writer is limited in this paper to his work about three periods of French literature which this author chose to draw a comparison between them: Classicism (13th century), Romanticism (1st. half of the 19th Century), and Symbolism (2nd half of the 19th Century). From each of these periods, Cohen had chosen three outstanding representatives which he would compare with those of the other periods. These works of each writer; Cohen will then compare to three non-poetic (prosaic) French texts, chosen from scientific literature which surely wouldn’t contain any poetic expressions. He would then identify the phonetic, syntactic, and semantic deviations between the poetic and prosaic materials.