Part 5

=Mountain Breezes=: Caused by the heating and cooling of the hills and valleys.

=Avalanche Winds=: Winds that are in front of a landslide, caused by the movement of the snow forcing the air in front of it.

Fig. 13 ]

Fig. 14 ]

Fig. 15 ]

Fig. 16 ]

Fig. 17 ]

=Volcanic Winds=: Due to volcanic eruption, which produces an outrush of air.

=A Squall=: Due to the sudden disturbance in temperature.

=A Simoon=: A desert wind.

VELOCITY OF WIND

The wind blows a great deal harder on water than on land, because on land it meets with various obstacles, whereas it has very little friction on the water.

THE FORCE OF THE WINDS

Wind blowing at 20 miles per hour has a force of 1¼ lbs. Wind blowing at 35 miles per hour has a force of 6 lbs. Wind blowing at 50 miles per hour has a force of 13 lbs. Wind blowing at 75 miles per hour has a force of 28 lbs. Wind blowing at 90 miles per hour has a force of 40 lbs.

DAY SIGNALS

Fig. 18 ]

Fig. 19 ]

Fig. 20 ]

Fig. 21 ]

Fig. 22 ]

Fig. 23 ]

NIGHT SIGNALS

Fig. 19A ]

Fig. 20A ]

Fig. 21A ]

Fig. 22A ]

Fig. 23A ]

NAME OF WINDS