An ebook filled with information and classroom activities covering several astrological topics such as the Earth's rotation and the solar system. Many tips and teaching tools are available to aid in discovering what the sky has to offer.

Text of Hume's most famous work from "Harvard Classics, Volume 37." Select desired chapter from this classic work.

This Harvard Classics site has the entire text of "Beowulf" from the 1910 P.F. Collier and Son edition. Well organized so you can click easily to get to the "Beowulf Prelude," "Beowulf: XLIII," or anything between.

Read this early 20th century translation of Beowulf with hypertext footnotes.

This site, from retired Harvard professor John W. Kimball, provides a detailed but understandable explanation of sexual reproduction in flowering plants. Includes informative, well labelled illustrations.

This site is a personal site from John W. Kimball, a Harvard Professor, that contains a brief definition of both topsoil and subsoil. A drawing supplements the text.

Read an online version of a 1909 Harvard Classics edition of "The Autobiography of Benjamin Franklin," including the front matter, illustrations, and an introductory note.

This reprint of the Harvard Classics edition includes biographical information, criticism and interpretation by Benjamin Wells and Matthew Arnold, as well as the text of "The Devil's Pool."