9298 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIFYLY. 
Diatoms, perhaps the nitrogen for their protoplasm, but 
none of these suggested explanations can as yet be either 
proved or disproved. Consequently, it is important that 
we should continue to collect any data that may seem to 
have a possible bearing on the matter; and we are now 
able to add an additional year’s sunshine records to 
those given in our last report. 
I. NUMBER OF DAYS WHEN SUNSHINE WAS RECORDED 
AT PORT ERIN. 

Average 
of 4 years 
1907. 1908. 1909. 1910. 1907-10 
OAIMATY ee cpa cen ssn 9 10 8 1] 10 
Hebruary) is...223 14 11 15 15 14 
March 2x isf> ibs. 20 17 13 21 18 
Ar] bert ceue rience 10 22 18 20 17 
NBY Gree tess seers 15 23 30 24 23 
JUNG ao den ssceecaes 16 21 25 24 21 
Jeily ase. tne: 19 20 19 24 20 
AViQUGUT Yoon sness as 20 17 23 19 20 
September ......... 16 16 21 19 18 
Octobere: c.s.ccsss5 12 16 19 18 16 
November ......... 12 11 13 13 12 
December ......... 6 7 13 10 9 
Totals 2.422. 169 191 217 218 198 


It will be seen in Table I that 1910 had more days 
of sunshine than any of the previous years, and that 
every month except August was above the average of 
the four years in that respect. If we take the three first 
months of the year as being those in which increased 
sunshine might have an effect upon the spring phyto- 
plankton, we find that January, February and March of 
1910, taken together, had eleven more days of sunshine 
than the corresponding period of the previous year, and 
five days more than the average of the four years. 
