# How to determine the direction of the world?

On a sunny day, with a pocket watch, you can chart on the horizon with an accuracy sufficient for practical purposes, **four directions of the world**: north, south, east and west. This method is so simple and accessible that one should wonder why it has not yet found wide application.

The determination of the directions of the cardinal points is based on the following. Putting a pocket watch on the palm, we turn it so that the hour hand is pointing toward the sun; then the point lying on the circumference of the dial, exactly halfway between the hour hand and the number XII, will show us the direction to the south. If, for example, the hour hand indicates the IV hour, then by pointing it toward the sun, make sure that the point lying in the middle between the figures IV and XII, that is, the point that marks the II o'clock points to the south. In the opposite side will be north, left - east, right - west.

This method of determining the cardinal points can be modified as follows. On the circle of the dial, find the point located midway between the number indicated by the hour hand and the point above XII and direct this center point towards the sun; then the number XII will indicate the direction to the south.

For example, if the clock shows an IV hour, then the clock should be sent to the sun by the division above the number II. Then the line drawn from the center of the clock to the number XII will indicate the direction to the south.

In confirmation of the above, it is enough to recall that in the XII o'clock the sun, the hour hand and the division on the circumference of the dial, located above the XII, lie on the same line, directed south.

After that, both the sun and the hour hand move in the same direction, only the hour hand will turn a full turn in 12 hours, and the sun in 24 hours, that is, twice as long for a period of time. The above rules for determining the cardinal points of the world are based on this. It should be added that before noon the center point between the arrow and the number XII should be searched for *in the direction of rotation of the arrows*, and after noon - *in the opposite direction*.

The direction of the cardinal directions determined in this way, of course, will not be accurate. Inaccuracy is caused by the fact that we put the clock in the horizontal plane, instead of placing it in the plane of the celestial equator. It does not take into account the difference between true solar time and conditional time, which show the clock. But for practical purposes, the above method will be quite satisfactory.

For a resident of the countries of the southern hemisphere, this method of determining the directions of the world should be changed as follows.

The point lying on the clock face above the hour hand should be directed towards the sun, then the line dividing the angle between the hour hand and the point above the number XII in half will indicate the direction to the north.