| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Essays Towards a Theory of Knowledge | Philip, Alexander | en | Time and periodicity -- The origin of physical concepts -- The two typical theories of knowledge -- The doctrine of energy. | Knowledge, Theory of; Cycles; Force and energy | 2007-11-09 | ||
| Initiative Psychic Energy Being the Sixth of a Series of Twelve Volumes on the Applications of Psychology to the Problems of Personal and Business Efficiency | Hilton, Warren, 1874- | en | Psychology, Applied; Psychic energy (Psychoanalysis) | 2005-12-17 | |||
| Aether and Gravitation | Hooper, William George | en | Philosophy of gravitation -- Matter -- Aether -- Energy -- Heat, a mode of motion -- Light, a mode of motion -- Aether and electricity -- Aether and magnetism -- Aether and Newton's laws of motion -- Aether and Kepler's laws -- Aether and comets -- Aether and starry world -- Aether and the universe. | Ether (Space); Gravitation; Force and energy; Matter | 2008-02-22 |