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British Rainfall 1895 page 20
but on turning to the table on page 19 of British
Rainfall, 1867, they are amply confirmed by the
oldestablished records at Troutbeck and Keswick, so that
their accuracy can hardly be questioned. Moreover they
followed shortly after the driest four consecutive years in
the whole record. The four years, 185558, had a mean of
106.26 in., and the four years, 18601863, of 167.16 in., or
more than half as much more. One four years is 31.05 inches
below the average, and the other 22.85 inches above it, so
that the eight years give a mean within an inch of that for
the whole fifty years.*
Fluctuation of Yearly Rainfall.  We have been
obliged to touch upon this subject in the previous section;
we now proceed to consider it fully, and to compare
Seathwaite results with previous investigations respecting
other stations.
Column3 on p.25 gives the ratio which the fall of every year
at Seathwaite bore to the mean for the 50 years,
e.g.:
Fall in 1844 = 157.87; Mean of 50 years, 137.31.
Then 151.87/137.31 = 1.11, which, to avoid decimals, is
written 111 (the average being taken as 100).
The essential features as to fluctuations are those which
will occur in one year, in two consecutive years, and in
three consecutive years. The following are the values for
Seathwaite:


 1
year.  2
years.  3
years. 
Driest  64  71  75 
Wettest  133  129  128 
Fluctuation  69  58  53 


In British Rainfall, 1883, pp.2932, there is an
article "On the limits of fluctuation of total Rainfall,"
which shows that on the average of 45 stations (only one,
however, exceeding 70 inches of mean fall) the values
corresponding with the above are 


 1
year.  2
years.  3
years. 
Driest  66  74  79 
Wettest  145     
Fluctuation  79     


As the values for the dry extremes in the abovementioned
article
* Confirmation respecting each of these extremes will
be found in the following papers:
DAVY, DR. JOHN, F.R.S. On an unusual drought in the Lake
District in 1859. Edinb. Phil. Soc. Trans. xxii.,
1861, pp.313318.
DAVY, DR. JOHN, F.R.S. On the rainfall of the Lake District
in 1861. Edinb. Phil. Soc. Trans. xxiii., 1861,
pp.5366.






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