132 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1956 



The maximums of record for short periods were: 5 minutes, 1.30 

 inches; 10 minutes, 1.65 inches; 1 hour, 4.11 inches; 2 hours, 4.81 

 inches; 24 hours, 10.48 inches. 



Table 1. — Annual rainfall, Barro Colorado Island 



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 



Total 



Year inchet 



1940 86.51 



1941 91.82 



1942 111. 10 



1943 120.29 



1944 111.96 



1945 120.42 



1946 87.38 



1947 77.92 



1948 83. 16 



1949 114.86 



1950 _.. 114.51 



1951 112.72 



1952 97.68 



1953 104.97 



1954 105.68 



station 

 average 



109. 43 

 108. 41 



108. 55 



109. 20 

 109. 30 

 109. 84 

 108. 81 

 107. 49 

 106. 43 



106. 76 



107. 07 

 107. 28 

 106. 94 

 106. 87 

 106. 82 



BUILDINGS, EQUIPMENT, AND IMPROVEMENTS 



The 110-220-volt, 60-cycle overhead electrical installation was com- 

 pleted. 



The electrical installation in the new building is about half com- 

 pleted. The necessary pipes, sinks, and valves have been obtained 

 and six electric dehumidiliers purchased. New metal shelving was 

 purchased for two of the rooms on the upper floor, which will house 

 the library and in which humidity control is readily possible, and a 

 supply of Dexion slotted angles was purchased for additional shelv- 

 ing, laboratory tables, and benches. Metal is being used wherever 

 possible instead of wood, which is so susceptible to termite infestation. 



All the old metal beds were repainted, and four comfortable new 

 beds were purchased for the two large laboratory-dormitory rooms 



