If the barometer be unsettled.
If the motion of the mercury be unsettled, expect unsettled weather.
If it stand at “much rain” and rise to “changeable,” expects fair weather of short continuance.
If it stand at “fair” and fall to “changeable,” expect foul weather.
N. B. Its motion upwards indicates the approach of fine weather: its motion downwards indicates the approach of foul weather.
CHAPTER XXIV.
SNOW. HAIL. RAIN.
Q. What is snow?
A. The condensed vapour of the air frozen, and precipitated to the earth.