XXIV CONTENTS. 



Chap. Page' 



24. Tlie doctrine of Hipparchus about the stars 59 



25. Examples from history of celestial prodigies ; Faces^ Lam- 



pades, a,nd Bolides ib. 



26. Trabes Ccelestes ; Chasma Cceli 60 



27. Of the colours of the sky and of celestial flame ib. 



28. Of celestial coronsB 61 



29. Of sudden circles 62 



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 ih. 



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. Eenephias and Typhon 79 



50. Tornadoes ; blasting winds ; whirlwinds, and other wonder- 



ful kinds of tempests 80 



51. Of thunder ; in what countries it does not fell, 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. G-encral laws of hghtning 84 



56. Objects which are never struck 86 



57. Showers of milk, blood, flesh, iron, wool, and baked tiles ... 87 



58. Ratthng 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. 



66. How the water is connected with the earth. Of the naviga- 



tion of the sea and the rivers 97 



67. Whether the ocean surrounds the earth 98 



