SECRETARY'S REPORT 155 



set of the Journal of Parasitology, and a long series of complete 

 bound volumes of the Experiment Station Record ; also considerable 

 laboratory glassware. 



RAINFALL 



In 1951, rains of 0.01 inch or more fell on 48 days (154 hours) 

 during the dry season (January to April), and on 194 days (764 

 hours) during the wet season (8 months) ; a total for the year of 

 242 days, 918 hours. Rainfall was 5.44 inches above the 27-year 

 average. During the dry season the excess amounted to 7.56 inches, 

 and during the wet season there was a deficiency of 2.12 inches. Five 

 of the eight wet-season months registered deficiencies, amounting to 

 a total of 11.24 inches. October was the wettest month, with 19.43 

 inches (27 days, 128 hours). March was the driest month, with 0.30 

 inch (4 days, 11 hours). A new 1-hour record was established on 

 October 12, 4.11 inches. The previous high was 3.68 inches. 



Table 1. — Annual rainfall, Barro Colorado Island, C. Z. 



Total Station 



Year inches average 



1925 104.37 



1926 118.22 113.56 



1927 116.36 114.68 



1928 101.52 111.35 



1929 87.84 106.56 



1930 76.57 101.51 



1931 123.30 104.69 



1932 113.52 105.76 



1933 101.73 105.32 



1934 122.42 107.04 



1935 143.42 110.35 



1936 93.88 108.98 



1937 124.13 110.12 



1938 117.09 110.62 



1939 115.47 110.94 



1940 86.51 109.43 



1941 91.82 108.41 



1942 111.10 108.55 



1943 120.29 109.20 



1944 111.96 109.30 



1945 120.42 109.84 



1946 87.38 108.81 



1947 77.92 107.49 



1948 83.16 106.43 



1949 114.86 106.76 



1950 114.51 107.07 



1951 112.72 107.28 



