the Annual Evaporation at Liverpool, Sec. 255 
circulation : “ All the rivers run into the fea, yet the fea 
“ is not full: unto the place from whence the rivers 
“ come., thither they return again.” 
5. About a century ago, the ingenious Mr. townley, 
of Townley in this county, made fome accurate obferva- 
tions on the depth of rain which fell annually in the 
neighbourhood of the hills which divide Lancafhire and 
Yorkfhire; and on taking a medium of fifteen years, he 
determines it to be 41 .5 1 6 inches^. The depth of rain, 
therefore, at Townley exceeds the depth of rain at Liver- 
pool about four inches. This is probably, however, lefs 
than the real difference ; for there was a fource of error 
in Mr. townley’s experiments with which the world was 
not at. that time acquainted. Mr. townley’s rain-gage 
was fixed full ten yards above the furface of the earth \ 
which circumftance, according to fome later obferva- 
tions, makes a very material difference in the refult of 
the experiment^. Were the obfervations to be repeated 
at Townley, and the rain-gage placed upon the ground, 
there can be no doubt but that the depth of rain would 
confiderably exceed 41.516 inches; for I find from a 
great number of experiments, made during the laft three 
(e) Phil. Tranf. abridged by Lowthorp, vol. II. p. 46. (/) Ibid. 
(g) Phil. Tranf. vol. LIX. art, 47. 
rears 
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