In the preceding chapters we have given you suggestions for the development of the principal forms of memory. But there are still other phases or forms of memory, which while coming under the general classification may be still considered as worthy of special consideration. For instance there may be suggestions given regarding the memorization of the contents of the books you read, the stories you hear, etc. And so we have thought it advisable to devote one chapter to a consideration of these various phases of memory that have been "left out" of the other chapters. Many of us fail to remember the important things in the books we read, and are often mortified by our ignorance regarding the contents of the works of leading authors, or of popular novels, which although we have read, we have failed to impress upon the records of our memory. Of course we must begin by reminding you of the ever present necessity of interest and attention--we cannot escape from these principles of the memory. The trouble with the majority of people is that they read books "to kill time," as a sort of mental narcotic or anæsthetic, instead of for the purpose of obtaining something of interest from them. By this course we not only lose all that may be of importance or value in the book, but also acquire the habit of careless reading and inattention. The prevalence of the habit of reading many newspapers and trashy novels is responsible for the apparent inability of many persons to intelligently absorb and remember the contents of a book "worth while" when they do happen to take up such a one. But, still, even the most careless reader may improve himself and cure the habit of inattention and careless reading.