SECRETARY'S REPORT 



145 



Investigator 



Swift, Lloyd W., U. S. Forest Service, Washing- 

 ton, D. C. 



Weber, Dr. Jay A., Miami, Fla. 



Weldon, A. L., State University of Iowa, Iowa 

 City, Iowa. 



Wetmore, Dr. Alexander, Smithsonian Institu- 

 tion. 



VISITORS 



Principal interest or special 



study 

 Wildlife and flora. 



Mollusks. 

 Fungi. 



Birds, and general inspection 

 of the plant. 



There were about 700 visitors to the island during the year. Most 

 of them came in small groups, and quite a number stayed overnight or 

 for a few days. Among these were Boy Scouts, Girl Scouts, and 

 photography clubs ; groups from schools in Panama City, Colon, and 

 elsewhere ; from colleges, and from the University of Panama. There 

 were also a number of groups from the Armed Forces, the United 

 States Embassy in Panama, many technical and specialized missions, 

 and branches of the Point-4 Program. 



DONATIONS 



The resident manager donated to the library a complete series of 

 bound volumes of the Journal of Agricultural Research; a series of 

 Natural History magazines, complete to date ; many miscellaneous pub- 

 lications ; and a quantity of laboratory glassware, chemicals, and other 

 supplies. 



RAINFALL 



In 1952, during the dry season (January to April) rains of 0.01 inch 

 or more fell on 36 days (98 hours) , and on 203 days (744) hours during 

 the 8 months of the wet season. 



Rainfall was 9.26 inches below the station average for 28 years — an 

 excess of 1.09 inches during the dry season and a deficiency of 10.35 

 inches during the wet season. March was the driest month, 0.11 inch, 

 and October the wettest, 16.96 inches. 



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



Total Station 



Year inche» average 



1925 104.37 



1926 118.22 113.56 



1927 116.36 114.68 



1928 lOL 52 in. 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 



Total 



year inches 



1939_ 115.47 



1940 86.51 



1941 91.82 



1942 lU. 10 



1943 120.29 



1944 111.96 



1945 120.42 



1946. 

 1947. 

 1948. 



87.38 



77.92 



83.16 



1949 114.86 



1950 114.51 



1951 112.72 



1952 97.68 



station 

 average 



110.94 

 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 



