30. Of unusually long eclipses of the sun _ib._ 31. Many suns _ib._ 32. Many moons 63 33. Daylight in the night _ib._ 34. Burning shields _ib._ 35. An ominous appearance in the heavens, that was seen once only _ib._ 36. Of stars which move about in various directions 64 37. Of the stars which are named Castor and Pollux _ib._ 38. Of the air, and on the cause of the showers of stones 65 39. Of the stated seasons 66 40. Of the rising of the dog-star 67 41. Of the regular influence of the different seasons _ib._ 42. Of uncertain states of the weather 69 43. Of thunder and lightning _ib._ 44. The origin of winds 70 45. Various observations respecting winds 71 46. The different kinds of winds 73 47. The periods of the winds 75 48. Nature of the winds 77 49. Ecnephias and Typhon 79 50. Tornadoes; blasting winds; whirlwinds, and other wonderful kinds of tempests 80 51. Of thunder; in what countries it does not fall, and for what reason _ib._ 52. Of the different kinds of lightning and their wonderful effects 81 53. The Etrurian and the Roman observations on these points 82 54. Of conjuring up thunder 83 55. General laws of lightning 84 56. Objects which are never struck 86 57. Showers of milk, blood, flesh, iron, wool, and baked tiles 87 58. Rattling of arms and the sound of trumpets heard in the sky 88 59. Of stones that have fallen from the clouds. The opinion of Anaxagoras respecting them _ib._ 60. The rainbow 89 61. The nature of hail, snow, hoar, mist, dew; the forms of clouds 90 62. The peculiarities of the weather in different places 91 63. Nature of the earth _ib._ 64. Of the form of the earth 94 65. Whether there be antipodes? _ib._