68. With a north wind it seldom thunders; but with a south and south-west wind, often.
FOR COLDER WEATHER.
69. If the wind change to the north and north-east.
70. If the wind change, in summer only, to the north-west.
71. If the wind shift to the east in summer only.
72. If the wind shift from south to south-east in winter.
FOR INCREASE OF WARMTH OR HEAT.
73. If the wind shift round to the south and south-west.
74. If the wind change from east, north-east, or north, to north-west and west, in the winter.
75. If the wind change to the east, in summer only; especially if from north-east.