Keeping Mentally Fit Author:Joseph Jastrow 1928. A guide to everyday psychology. This book is based on the belief that there are many ways of meeting the demand for knowledge of the mind's behavior and one of them is to follow the popular habit of the mind. This browses more readily than it studies, wants to be stimulated as well as informed, absorbs willingly what ties up with establish... more »ed interests, and that means practical ones. There are all sorts and conditions of readers; and the psychology of the average reader is considered in this work.« less