On Colours (American English: On Colors, Greek: ΠΕΡΙ ΧΡΩΜΑΤΩΝ, Latin: DE COLORIBUS) may not have been written by Aristotle. Theophrastus or Strato who were the second and third scholarchs of the Lyceum (ΛΥΚΕΙΟΝ) may have been the actual author. The writer emphasizes the use of observation to confirm his or her theories regarding the mechanisms causing colour and colour change in elements, plants and animals. Translated by Thomas Loveday & Edward Forster. Read in English for LibriVox by Geoffrey Edwards. Painting: Comtesse d'Haussonville by Jean-Auguste-Dominique Ingres.

On Memory and Recollection (Greek: ΠΕΡΙ ΜΝΗΜΗΣ ΚΑΙ ΑΝΑΜΝΗΣΕΩΣ, Latin: DE MEMORIA ET REMINISCENTIA) by Aristotle. Translated by William Alexander Hammond. Read for LibriVox by Geoffrey Edwards. Painting: La Baigneuse Valpinçon by Jean Auguste Dominique Ingres, 1808.

On Dreams (Greek: ΠΕΡΙ ΕΝΥΠΝΙΩΝ, Latin: DE INSOMNIIS) discusses sensation when awake and dreaming. Written by Aristotle. Translated by William Alexander Hammond. Painting: Portrait of Louise-Antoinette Feuardent by Jean-François Millet, 1841. Scanned by The J. Paul Getty Museum. 

On Things Heard (Greek ΠΕΡΙ ΑΚΟΥΣΤΩΝ, Latin DE AUDIBILIBUS) is a work which was formerly attributed to Aristotle, but is now generally believed to be the work of Strato of Lampsacus who was the third scholarch of the Lyceum. Our extant version of On Things Heard is made up of long extracts included in Porphyry's Commentary on Ptolemy's Harmonics, and is thus partial. The extracts are concerned with the nature of sound production. (Wikipedia) Painting: Jeanne d’Arc au sacre du roi Charles VII (Joan of Arc at the Coronation of Charles VII) by Jean Auguste Dominique Ingres, 1854.

On Melissus, Xenophanes, and Gorgias (Greek: ΠΕΡΙ ΜΕΛΙΣΣΟΥ, ΞΕΝΟΦΑΝΟΥΣ ΚΑΙ ΓΟΡΓΙΟΥ; Latin: DE MELISSO, XENOPHANE, GORGIA) may not have been written by Aristotle. Translated by T. Loveday and E.S. Forster. Painting: Auto de Fe en la Plaza Mayor de Madrid, Francisco Rizi, 1683, óleo sobre lienzo, 277 x 438 cm, Museo del Prado, Madrid.

This third of the six Enneads (ΕΝΝΕΑΔΕΣ) written by Plotinus (ΠΛΩΤΙΝΟΣ); arranged by Porphyry (ΠΟΡΦΥΡΙΟΣ) and translated by Kenneth Sylvan Guthrie contains the following nine books: 1. Concerning Fate (0:00:00) 2. Of Providence (0:31:39) 3. Continuation of That on Providence (1:49:41) 4. Of Our Individual Guardian (2:20:34) 5. Of Love, or "Eros" (2:44:01) 6. Of the Impassibility of Incorporeal Entities (3:27:41) 7. Of Time and Eternity (4:56:20) 8. Of Nature, Contemplation and Unity (6:11:06) 9. Fragments About the Soul, the Intelligence, and the Good (7:01:53) Engraving: Melencolia I by Albrecht Dürer.

On Longevity and Shortness of Life (Greek: ΠΕΡΙ ΜΑΚΡΟΒΙΟΤΗΤΟΣ ΚΑΙ ΒΡΑΧΥΒΙΟΤΗΤΟΣ; Latin: DE LONGITUDINE ET BREVITATE VITAE) is one of the seven short treatises on nature (Latin: PARVA NATURALIA). In this text Aristotle provides explanations for the different lifespans of plants, animals, men and women. Translated by William Alexander Hammond. Photograph: Seated Woman with "Spirit" of a Young Man by Unknown Maker about 1865-1875. Scanned by The J. Paul Getty Museum. 

In this engaging discussion, Aristotle, the renowned Ancient Greek philosopher, dives into the intricacies of Athenian governance. He explores Solon's groundbreaking reforms that abolished debt slavery, reshaping the political landscape. The impact of social divides and the transition from tyranny to democracy are highlighted, showcasing key figures like Cleisthenes. Aristotle critiques the balance of power and justice in leadership, emphasizing the need for equitable governance. This dialogue unravels the complexities of civic life in ancient Athens, blending history with profound insights.

On Prophecy in Sleep (Greek: ΠΕΡΙ ΤΗΣ ΚΑΘ ΥΠΝΟΝ ΜΑΝΤΙΚΗΣ) is also known as On Divination in Sleep (Latin: DE DIVINATIONE PER SOMNUM). In this short book Aristotle asks why alleged prophetic dreams typically come to base people at night instead of to the wise during the day which would be more consistent with a benevolent deity. Painting: Shepherd and Sleeping Shepherdess attributed to Reyer Jacobsz van Blommendael (1628-1675). Scanned by The J. Paul Getty Museum. 

Sophist (ΣΟΦΙΣΤΗΣ) is a dialogue written by Plato which discusses being and not-being while drawing a distinction between true philosophers and mere sophists. Translated by Benjamin Jowett. Read in English by Geoffrey Edwards. Meta Coordinator: Bart de Leeuw. Proof Listener: Rapunzelina. Painting: Andromeda by Edward Poynter, 1869.