148 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1947 



During the dry season, there were no rains of 0.40 inch per hour 

 during 1947, and only 51 such hours in the wet season, amounting to 

 40.68 inches, or 46.6 of the total rainfall for the year. And these 

 40.68 inches fell during only 6.1 percent of the total hours we had 

 rain. This means that the balance, 46.70 inches, fell during 781 hours, 

 or an average of only .06 inch per hour. The three heaviest rains each 

 month amounted to a total of 45.59 inches in only 36 days. This leaves 

 only 41.79 inches for the remaining 197 days. 



Considering now these three heaviest rains each month (midnight 

 to midnight) , we have the following interesting data : 



Dry season : 12 days, 3.08 inches, or 79.2 percent of the dry season total. 

 Wet season : 24 days, 42.53 inches, or 50.9 percent of the wet season total. 

 The year : 36 days, 45.61 inches, or 52 percent of the year's total. 



The remaining days when it rained show : 



Dry season : 32 days, 0.32 inch, or an average of 0.01 inch per day of rain. 

 Wet season : 165 days, 40.96 inches, or an average of 0.248 inch per day of rain. 

 The year : 197 days, 41.79 inches, or an average of 0.212 inch per day of rain. 



For comparison, the following tables are presented, covering the 

 rainfall for other localities in the Canal Zone and Republic of Panama 

 data on temperatures, relative humidities, barometric pressures, etc.; 

 and the maximum and minimum yearly rains of record for 19 impor- 

 tant localities. These data are taken from the reports of the Chief 

 Meteorologist of the Panama Canal. They give a better understanding 

 of the climate, and it is only to be regretted that comparable data are 

 not available for a great many more localities in the Republic of Pan- 

 ama. To an ecologist, these data are of inestimable value. 



Table 6. — Annual rainfall at other Panamd stations, in inches 



