634 Meteorological Oblervations. 
II. All heavy rains, viz. fuch as fwell the 
rivers confiderably fo as to occafion floods, 
come on with the wind at S. and from that to 
the S. W.; and moftly terminate with the wind 
increafing in force, and veering round to the 
weft. Whenthe wind is in the other points, 
the weather is generally dry, or if it rains, 
the rain is neither heavy nor lafting. 
An additional reafon why thefe winds are fo 
productive of rain, in this fituation, feems to 
be, that when they bring the clouds loaded with 
moifture from the fouth and fouth-weft quarters, 
thefe are driven with violence againft, or 
forcibly attraéted by the high range of hills, 
which divide Yorkfhire from Weftmorland and 
Lancafhire. In confequence of this their 
contents are more completely depofited on this 
fide of thefe mountains, than would have been 
the cafe had the country been more level. [I 
have been informed, that the depofition is fre- 
quently fo complete on the weftern fide of thefe 
hills, that whilft we are deluged with rain, the 
clouds which pafs over to the Yorkfhire fide 
appear fleecy and light, and that the weather is 
dry. Acafe which I believe is not uncommon, 
where a high ridge of hills runs through a 
country.* This 
* Dr. Campbell’s obfervation is very juft. The fummer 
of 1792 was remarkably dry in Yorkfhire, and all the 
eaftern fide of the Englifh Appenine, was burnt. up for 
want of rain; while on the weftern-fide they had plenty 
of rain, and moft abundant crops of grafs, T. the 
