THE METEOROLOGY AND CLIMATE OF PLYMOUTH. 433 
experiments extending over fifty-six months, Mr. Strachan has 
calculated that the mean inclination of falling rain makes an angle 
of 42° from the vertical. The rainfall here is very fluctuating, 
ranging from 45-06 inches in 1872, to 24:10 in 1870, but the 
average fall is 37 inches, and the number of rainy days 182°8, 
or nearly 183. I have called a rainy day one when not less 
than one-hundredth of an inch falls. The months of greatest 
fall are January and September, and those of least fall are June 
and May. 
Rainy | Rainfall |Percentage 








Seasons. Months. ree Rainfall. oe os nie x Be eos 
"| Inches. Birth: 
March 14:08 | 2°532 ) 7°70 6°84 
Spring ( April 13°19 | 2°303)|' 3865 | 7-084 7°22 6°22 
May | 11°38] 2-249|) 6-23 | 6-08 
June 11°50 | 1:°769 6°29 4°78 
Summer | July 13°25 | 2-508 39°25 7173 7°25 6°78 
August | 14°50] 2°896 j 7°93 7°83 
September| 15°63] 4-223 8°55 11°41 
Autumn October 18°44 | 3:°669 | ) 49°44 | 11°136 10°09 9°92 
November| 15°37] 3-244 8°41 8°77 
9°74 10°31 
December | 17°81} 3°816 
Winter January | 19°69] 4°481 55°44 | 11°608| 10°77 | 12-11 
February | 17°94] 3°311 9°82 8:95 

ee 


182°78 | 37-001 100-00 | 100°00 
The six summer months from March to August have 77:90 rainy 
days, and a rainfall of 14°257 inches, which gives 42°62 per cent. 
of rainy days, and 38°53 per cent. of the rainfall. 
The six winter months from September to February have 10488 
rainy days, and a rainfall of 22°744 inches; this gives 57°38 per 
cent. of the rainy days, and 61°47 per cent. of the rainfall of the 
year. 
We sometimes, though rarely, experience heavy rains. Taking 
the past twelve years, 1869 to 1880 inclusive, we have had on the 
average a rainfall of half an inch, or above, three times in two 
months ; a rainfall of three-quarters of an inch about once every 
three months ; and an excessive daily rainfall, or one exceeding an 
inch, about five times in two years. On one occasion only have I 
measured more than two inches (2°15); viz, in the twenty-four 
