Theory of pneumatology; in reply to the question, what ought to be believed or disbelieved concerning presentiments, visions, and apparitions, according to nature, reason, and Scripture.

Tr. of: Geister-kunde, Theorieder.

The theory of moral sentiments; or, An essay towards an analysis of the principes by which men naturally judge concerning the conduct and character, first of their neighbours, and afterwards of themselves. To which is added, a dissertation on the origin of languages.

Mode of access: Internet.

The theory of wages and its application to the eight hours question and other labour problems;

Mode of access: Internet.

Studies in the theory of human society,

Mode of access: Internet.

Outlines of psychology, with special reference to the theory of education. A text-book for colleges.

References at end of chapters.

Hartley's theory of the human mind, on the principle of the association of ideas; with essays relating to the subject of it.

Mode of access: Internet.

The educational theory of Immanuel Kant;

Series title also at head t.-p.

The foundations of Einstein's theory of gravitation /

Mode of access: Internet.

The theory of morals /

Includes bibliographical references.

The theory of mind as pure act,

Mode of access: Internet.

The theory of thought. A treatise on deductive logic ...

Mode of access: Internet.

The theory of errors and method of least squares,

Mode of access: Internet.

The theory of music. As applied to the teaching and practice of voice and instruments.

Mode of access: Internet.

Darwinism; an exposition of the theory of natural selection, with some of its applications.

Mode of access: Internet.

The temporal power of the pope : containing the speech of Hon. Joseph Chandler, delivered in the House of Representatives of the United States, January 11, 1855. With nine letters, stating the prevailing Roman Catholic theory in the language of papal writers /

Mode of access: Internet.