At this point the Guide to Reading parts company with you and leaves you in the hands of the economists, the historians, the chemists, the philosophers. Special teachers and advisers will conduct you into those subjects. They are organized subjects. The paths to them are steep but well graded and paved. If you wander upon these paths without guidance you will not harm yourself, and, if you do not try to discuss what you do not understand, you will not harm anyone else. The list of works in philosophy and science which I append includes some that I, an errant reader, have stumbled into with pleasure and profit. I do not know surely whether any one of them is the best in its subject or whether it is the proper work to read first. I only know in general that a civilized man should for his own pleasure and enlightenment set his wits against a hard technical book once in a while for the sake of the exercise, and that although for purposes of wisdom and happiness the Literature of the Ages contains all that is necessary, everybody ought to go a little way into some special subject that lies less in the realm of literature than in the realm of science. LIST OF WORKS IN SCIENCE AND PHILOSOPHY _Supplementary to Chapter XIII_ In this list are a few volumes of scientific and philosophic works, notable for their literary excellence, or for their clearness to the general reader, or for the historical and human importance of the author. There is no attempt at order or system except the alphabetical sequence of authors. Some philosophic and scientific works will be found in the list of essays, on page 192. GRANT ALLEN. _The Story of the Plants._ In _Appleton’s Library of Useful Stories_. MARCUS AURELIUS ANTONINUS. _Thoughts or Meditations._ In _Everyman’s Library_ and many cheap editions. JOHN LUBBOCK (Lord Avebury). _The Beauties of Nature and the Wonders of the World We Live In._ _The Use of Life._ A popular writer on scientific and philosophic subjects. LIBERTY HYDE BAILEY. _First Lessons with Plants._ _Garden Making._ ROBERT STAWELL BALL. _The Earth’s Beginning._ _Star-Land: Being Talks with Young People._ JOHN BURROUGHS. _Birds and Bees and Other Studies in Nature._ _Squirrels and Other Fur Bearers._ These books are especially suitable for young readers. CHARLES TRIPLER CHILD. _The How and Why of Electricity._ For the uninformed reader. JAMES DWIGHT DANA. _The Geological Story Briefly Told._ CHARLES ROBERT DARWIN. _On the Origin of Species._ _What Mr. Darwin Saw in His Voyage Round the World in the Ship “Beagle.”_ The second of the two books named is especially for young readers. The book from which it is taken, Darwin’s “Journal” of the voyage is in _Everyman’s Library_. For expositions of Darwin’s theories, see Huxley’s “Darwiniana,” Wallace’s “Darwinism” and David Starr Jordan’s “Footnotes to Evolution.” GOLDSWORTHY LOWES DICKINSON. _The Greek View of Life._ _A Modern Symposium._