Sentence Examples


  • Of lost works by Archimedes we can identify the following: (I) investigations on polyhedra mentioned by Pappus; (2) Archai, Principles, a book addressed to Zeuxippus and dealing with the naming of numbers on the system explained in the Sand Reckoner; (3) Peri zygon, On balances or levers; (4) Kentrobarika, On centres of gravity; (5) Katoptrika, an optical work from which Theon of Alexandria quotes a remark about refraction; (6) Ephodion, a Method, mentioned by Suidas; (7) Peri sphairopeoia, On Sphere-making, in which Archimedes explained the construction of the sphere which he made to imitate the motions of the sun, the moon and the five planets in the heavens.
  • Pappus quotes from three books of Mechanics and from a work called Barulcus, both by Hero.
  • Halma) has preserved a fragment, and to which Pappus also refers.
  • Pappus, in his Collections, treats of its history, and gives two methods by which it can be generated.
  • Any plane section of the screw (plectoidal of Pappus) surface so obtained is the quadratrix.

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