CYCLONES. 149 
north-easterly direction over Burton, that we move Burton in a 
south-westerly direction across the Cyclone (below its centre), 
which for our present purpose will amount to exactly the same 
thing. Now move the point of a pencil representing Burton in 
a south-westerly direction across the Cyclone. Where the pencil 
first enters the Cyclone, from the wind arrows marked on it you 
will notice that the wind will be blowing from about the south-east ; 
as the pencil is moved on, the arrows will be noticed to alter 
slowly to the south, further on to the south-west, then to the west, 
and finally to the north-west. This changing of the wind, or 
“‘ veering ” as it is called (that is to say, following the course of 
the sun from east to west), is then a sign that a Cyclone is passing 
us with its centre to the north of the point at which we are 
stationed. 
Now let us see what happens if a Cyclone passes us with its 
centre south of Burton; in this case, draw the point of a pencil 
across the Cyclone in a south-westerly direction, but keeping the 
line north of the centre. Now we see the wind begins to blow 
from the south-east pretty much as in the first case, but this time 
the wind alters its direction gradually to the east, then to north- 
east, and finally to north. This movement of the direction of the 
wind is called ‘“ backing,” as it is in an opposite direction to the 
movement of the sun. It would take too much time to describe 
the changes of the wind, due to Cyclones moving in all possible 
directions, but the two cases given are far the most common, 
The other changes can easily be worked out in a similar manner 
to the above; further, a good knowledge of these changes is very 
valuable, as it often enables a solitary weather observer by this 
means, and his barometer also, to ascertain the direction Cyclones 
in his vicinity are moving, and, consequently, to forecast the 
weather. 
I had wished to confine this paper entirely to Cyclones, but I 
find it impossible not to refer to Anti-Cyclones without leaving 
the subject in a very unsatisfactory state. When I first spoke of 
Cyclones, I stated that the air after revolving round them towards 
the centre, was carried upwards from the surface of the earth to the 
