179 
Wind. 
The next point is the amount of wind. It has always 
been maintained that there is very little wind in the valley 
in winter, but as bare statements on such a subject are not 
often satisfactory, I put up a Robinson’s anemometer. I 
was not able to find an altogether suitable place, for on the 
roof of a house we might measure the valley wind, but this 
would have very little meteorological value, and none 
physiologically, besides which the instrument would soon 
have been clogged with smoke. I therefore decided to put 
it up just over 5ft. 5in. above the ground, in a position quite 
open to the north and south, but unfortunately somewhat 
protected by a building (160 feet way) from the south-west 
wind, of which we have had little this winter. A building 
on the W.N.W. (120 feet away) did not make any difference, 
as the wind in this spot never blows from that direction. 
In a valley the wind often varies very much within short 
distances, both in direction and force, but I think we may 
say that my instrument would fairly show the force of wind 
to which a patient was exposed in taking an ordinary walk. 
As the value of these observations were physiological, I 
noted down the movement at 9 a.m. and 3 p,m., thus getting 
our winter day ; and as the valley wind rises in the after- 
noon, I also observed, with a few exceptions, at 1 p.m. I 
have not yet applied the correction for diminished barome- 
trical pressure, but give the figures as registered, but thus 
unrevised. The total movement was for— 
Day. Night. 
Total. From 9 to 3 : From 3 to 9 : 
Miles. 6 hours. 18 hours. 
November, 1881 561*69 ... — ... — 
December 727*99 ... 256*14 ... 471*85 
January, 1882 283*76 ... 77*95 ... 205*81 
February 597*92 ... 290*95 ... 306*97 
March 1656*61 ... — ... — 
April (to 24th) 1439*59 ... — ... — 
625*04 
984*63 
