Categories, a portion of his Organon; it tries to encompass all things under the ten categories of Aristotle. 12. A summary of De Interpretatione, another subsection of his Organon; an essay defending the usefulness of logic in general is included after its discussion of Aristotle's propositions. 13. A summary of Prior Analytics, another work included in Aristotle's Organon 14. A summary of Posterior Analytics, another work included in Aristotle's Organon Natural Sciences According to Sprenger and Godefroid de Callataÿ, this risala is a summary of Posterior Analytics, the followup to Prior Analytics in the Organum; for Thomas Davidson and Eric van Reijn, this risala concerns rather Aristotle's Physics. Regardless, when the Brethren discuss physics, they employ another hierarchical characterization of the Great Chain of Being: Motion Physical Generation Corruption Augmentation Diminution Alteration Translation Straight Circular Combination Spiritual A summary of Aristotle's de Coelo, with a discussion of astronomy and circumnavigating the kaaba at Mecca A summary of On Generation and Corruption. Sprenger says that it "differs widely from Aristotle's work of the same name. It contains a popular explanation of Aristotle's ideas on the subject, interspersed with numerous moral reflections, and other extraneous matters." On matter, space, motion, and time, according to Aloys Sprenger; Thomas Davidson and Godefroid de Callataÿ list this risala as being on meteorology, using Aristotle's Meteorology; van Reijn simply calls this epistle "The Celestial Bodies". On minerals, which segues into a discussion of souls ascending to heaven A discussion of Nature (the metaphysical entity of the Brethren's hierarchy) and its creation of the animals, plants, and minerals A discussion of the various kinds of plants, and of a quasi-Great chain of being view of the natural hierarchy, in which plants are superior to minerals, but inferior to animals, which are themselves inferior to humans, and thence to angels- and all are inferior to the Creator. The Brethren do not see a clear and sharp break between domains, according the palm tree near-animal status because of its division in male and female sexes. "The Generation of Animals" A discussion and classification of animals. (This was the risala the Rev. T. Thomason first published an excerpt from). "The Composition of the Body." On man's body, and a hermetic view ("As above, so below") view of man's body as a microcosm related to the macrocosm. Ostensibly a summary of the On Sense and the Sensible by Aristotle; it lays