Hiram M. Stanley 
Studies in the Evolutionary Psychology of Feeling [PDF ebook] 

This work, originally published in 1895, does not profess to be a treatise on the subject of feeling, but merely a series of studies, and rather tentative ones at that. It was the author’s intent to deduce from the standpoint of biologic evolution the origin and development of feeling, and then to consider how far introspection confirms these results.