FEB. 19, 1923 HUMPHREYS: THE MURMUR OF THE FOREST syll 
and precipitation all are closely interrelated, some of them even in 
the sense of cause and effect, nevertheless, and for convenience, they 
are here discussed severally, and more or less independently, the 
whole constituting what might, perhaps, be regarded as a chapter on 
mountain meteorology. 
{L. W. ITumphreys, photo.) 
Fig. 2. Peters Mountain and Gap Mills Valley 
Opposing winds near top of mountain.—There occasionally are 
strong winds simultaneously up both sides of a high mountain ridge, 
such as Peters Mountain, near its top, when there are only light winds, 
or none at all, on the lower slopes and in the adjacent valleys. The 
explanation of this condition, which may or may not be associated 
with the coming of wide-spread cloudiness and extensive precipitation, 
consists of two parts: (1) How there may be a strong wind only near 
the top of a mountain, with but little or no appreciable movement 
of the air lower down and in the valleys. (2) How a strong wind can 
blow up one side of a mountain near its top at the same time that 
another strong wind is blowing up the other side, also near the top. 
