SEA-FISHERIES LABORATORY. 299 
II. NUMBER OF HOURS OF SUNSHINE. 

Average Average Average 
of 1908 of 1908, of 4 
and 1909and years, 


1907. 1908. 1909. 1910. 1909. 1910. 1907-10 
January 242 35 27 284 31 304 28% 
February 58 284 574 564 43 474 50 
March 113 833 774 1004 804 87 934 
April 694 1284 1323 125 1304 1283 1132 
May 103 179 1983 1644 1883 1802 1614 
June 81 1544 160 158% 157 157% 1384 
July 143 1 1223  188$ 116% 1403 41414 
August 101 118 130 80% 1244 1093 1074 
September 1214 60 122 1164 91 993 105 
October 461 81 61 834 71 754 68 
November 44 554 584 4] 57 514 49} 
December 133 21 394 25 304 284 243 
Totals 9183 1,055 1,1862 1,168} 1,121 1,137 1,082 


Then, if we look into the number of recorded hours 
of sunshine on Table II, we find that January, February 
and March have in 1910 over twenty hours more sun- 
‘shine than in 1909, and about thirteen hours more than 
the average of the same period in the four years. If we 
omit 1907 from the averages the predominance of 1910 
becomes still more marked. 
In short, the early months of 1910 had an unusual 
amount of sunshine, and so had those of 1907, and we 
have seen above that in these two years there was a 
much greater phyto-plankton maximum in April than 
was the case in the two intermediate years. The figures 
are given in the following table :— 

1910. 
1907. 1908. 1909. 
Hours of sun in Jan. + Feb. + March.. 1952 147 1614 1854 
Hours. Osun Maro you. ...ccs score veo 113 834 774 1004 
Bay Plankton in April, per haul, inc.c. 18-3 8-1 7:0 31-7 
Total Plankton in April, per haul, in c.c. 13-7 4:3 6:3 22:5 

As it is possible that it is the sun in March that has 
most effect upon the April phyto-plankton, we have 
given also the figures for March alene in each of the 
years. 
