69. Causes of sterility 97 70. Remedies against these noxious influences 101 71. Work to be done after the summer solstice 102 72. The harvest 103 73. The methods of storing corn 104 74. The vintage, and the works of autumn 107 75. The revolutions of the moon 111 76. The theory of the winds 113 77. The laying out of lands according to the points of the wind 114 78. Prognostics derived from the sun 117 79. Prognostics derived from the moon 119 80. Prognostics derived from the stars 120 81. Prognostics derived from thunder 121 82. Prognostics derived from clouds _ib._ 83. Prognostics derived from mists 122 84. Prognostics derived from fire kindled by man _ib._ 85. Prognostics derived from water _ib._ 86. Prognostics derived from tempests 123 87. Prognostics derived from aquatic animals and birds _ib._ 88. Prognostics derived from quadrupeds 124 89. Prognostics derived from plants 125 90. Prognostics derived from food _ib._ BOOK XIX. THE NATURE AND CULTIVATION OF FLAX, AND AN ACCOUNT OF VARIOUS GARDEN PLANTS. 1. The nature of flax—marvellous facts relative thereto 129 2. How flax is sown: twenty-seven principal varieties of it 131 3. The mode of preparing flax 135 4. Linen made of asbestos 136 5. At what period linen was first dyed 138 6. At what period coloured awnings were first employed in the theatres _ib._ 7. The nature of spartum 139 8. The mode of preparing spartum 140 9. At what period spartum was first employed 141 10. The bulb eriophorus _ib._ 11. Plants which spring up and grow without a root—plants which grow, but cannot be reproduced from seed 142 12. Misy; iton; and geranion 143 13. Particulars connected with the truffle 144 14. The pezica _ib._ 15. Laserpitium, laser, and maspetum _ib._ 16. Magydaris 147