These efforts in abstracting will qualify the young student to distinguish the main ideas from the subordinate ones, and he will then know when reading a book what to attend to and what to reject. Try a short essay first, then a longer one; and at last, when you are familiar with the method, attack any book, and you will cope with it successfully. Not much practice in this way will be required to enable you to know, from a glance at the _table of contents_, just what to assail and what to disregard. And in all your _first_ attempts in reading a technical work, make out an Abstract of each chapter in writing, and then deal only with this Abstract. Whenever the Subject is not treated in a desultory manner, but with logical precision, you will soon be able to find Suggestive or Prompting Words in the Sequence of Ideas and in the successive Links in the Chain of Thought that runs through the exposition. If there is no such Sequence of Ideas or Chain of Thought running through it, it may serve as an amusement, but is little likely to command serious study. _In a short time_ you will be able, in the language of Dr. Johnson, "to tear out the heart of any book." Hazlitt said that Coleridge rarely read a book through, "but would plunge into the marrow of a new volume and feed on all the nutritious matter with surprising rapidity, grasping the thought of the author and following out his reasonings to consequences of which he never dreamt." Such a result is rarely attained even by the ablest of men--but it is the ultimate goal at which every student should aim--an aim in which he will be largely assisted by the ART OF ASSIMILATIVE MEMORY.
There are four methods of learning abstracts: one is by Synthesis; the other is by the Analytic-Synthetic Method, the third is mostly by Assimilative Analysis, and the fourth method is by the memory developed and trained by the System, but which is not consciously used.
(1) It is the novelties of Fact, Opinion, Illustration, &c., set forth in your Abstract that you correlate together, thus: You correlate the Title of the First Chapter to the Title of the Book; next, the Titles of the Chapters to each other; and then you correlate, in each chapter, the first leading idea or proposition to the title of the chapter, the second leading idea to the first, &c., &c. In this way you will proceed until you have absorbed all the _new ideas_, _facts_, _statistics_ or _illustrations_, or whatever you wish to retain. You can then test yourself on the work by calling to mind whatever you have thus cemented together. If this is well done you will never have to do it again.