SECRETARY'S REPORT 



183 



VISITORS 



Approximately 190 visitors were permitted to visit the island for a 

 day. 



RAINFALL 



During the dry season (January through April) of the calendar 

 year 1961, rains of 0.01 inch or more fell during 38 days (97 hours) 

 and amounted to 7.63 inches, as compared to 26.64 inches during 1960. 

 During the wet season of 1961 (May through December), rains of 

 0.01 inch or more fell on 192 days (752 hours) and amounted to 92.58 

 inches, as compared to 113.43 inches during 1960. Total rain for the 

 year was 100.21 inches. During 37 years of record, the wettest year 

 was 1935 with 143.42 inches, and the driest was 1930 with only 76.57 

 inches. February was the driest month of 1961 (0.24 inch) and 

 August the wettest (19.73 inches). The maximum records for short 

 period were: 5 minutes, 1.30 inches; 10 minutes, 1.65 inches; 1 hour, 

 4.11 inches; 2 hours, 6.33 inches; 24 hours, 10.87 inches. 



Table 1. — Anniial rainfall, Barro Colorado Island, Canal Zone 



672-174—63- 



-13 



