14. Obelisks 331 15. The obelisk which serves as a dial in the Campus Martius 334 16. Marvellous works in Egypt. The pyramids 335 17. The Egyptian Sphinx 336 18. The Pharos 339 19. Labyrinths _ib._ 20. Hanging gardens. A hanging city 343 21. The Temple of Diana at Ephesus _ib._ 22. Marvels connected with other temples 344 23. The fugitive stone. The seven-fold echo. Buildings erected without the use of nails _ib._ 24. Marvellous buildings at Rome, eighteen in number 345 25. The magnet: three remedies 355 26. Stone of Scyros 357 27. Sarcophagus, or stone of Assos: ten remedies _ib._ 28. Chernites _ib._ 29. Osseous stones. Palm stones. Corani. Black stones 358 30. Molar stones. Pyrites: seven remedies 359 31. Ostrocites: four remedies. Amianthus: two remedies 360 32. Geodes: three remedies _ib._ 33. Melitinus: six remedies _ib._ 34. Gagates: six remedies 361 35. Spongites: two remedies 362 36. Phrygian stone _ib._ 37. Hæmatites: five remedies. Schistos: seven remedies _ib._ 38. Æthiopic hæmatites. Androdamas: two remedies. Arabian hæmatites. Miltites or hepatites. Anthracites 363 39. Aëtites. Taphiusian stone. Callimus 364 40. Samian stone: eight remedies 365 41. Arabian stone: six remedies _ib._ 42. Pumice: nine remedies 366 43. Stones for mortars used for medicinal and other purposes. Etesian stone. Thebaic stone. Chalazian stone 367 44. Stone of Siphnos. Soft stones 368 45. Specular stones _ib._ 46. Phengites 369 47. Whetstones 370 48. Tophus 371 49. The various kinds of silex _ib._ 50. Other stones used for building 372 51. The various methods of building _ib._ 52. Cisterns 373