REPORT OF THE SECRETARY 



149 



Table 7. — Maximum and minimum rainfall, Barro Colorado Island, 1925 to 19.'f(> 



Maximum Minimum 



45 

 05 

 19 

 10 

 09 

 43 

 52 



August 21.44 



September 19.96 



October 22.23 



November 41. 59 



December 28. 15 



Maiimum Minimum 



5. 93 

 6.07 

 6.06 

 7.21 



1.88 



Year 143.42 



(6.57 



Table 8. — J9/f6 pressure, temperature, relative humidity, etc. 



Pressure (reduced to sea level): 



Maximum.- 



Minimum 



Annual mean (blhourly) 



Temperature (Fahrenheit): 



Annual mean_.. 



Absolute maximum. 



Mean daily maximum 



Absolute minimum 



Mean daily minimum 



Greatest daily range 



Mean relative humidity (percent) 



Mean wet thermometer ' 



Mean dew point i. 



Mean vapor pressure i 



Balboa 

 Heights 



30. oin 

 29. 6S0 

 29.831 



79.6 

 97 

 88.2 

 69 



74.0 

 23 



82.8 

 74.1 

 73.1 

 .814 



Madden 

 Dam 



29. 990 

 29.660 

 29.817 



77.9 

 96 

 87.3 

 64 



72.0 

 26 



82.8 

 73.9 

 72.9 

 .807 



Cristobal 



30. 010 

 29. 680 



20.843 



79.9 

 90 

 83.8 

 70 

 76.5 

 16 



82.2 

 75.4 

 73.8 

 .835 



1 Mean of 8 a. m. observations except Cristobal which is the mean of 8 a. m. amd 8 p.m. values. Mean 

 relative humidity is bihourly mean. 



Table 9a. — Maximum amounts of precipitation in inches {years of record) 



Balboa 



Balboa Heights 

 Pedro MigTieL. 

 Madden Dam.. 



Qamboa 



Barro Colorado. 



Gatan 



Cristobal 



10 minutes 



1.68 

 1.27 

 1.23 

 1.20 

 1.17 

 1.40 

 1.36 

 1.20 



1 hour 



4.78 

 4.49 

 3.85 

 4.19 

 3.85 

 3.57 

 5.68 

 5.16 



24 hours 



7.57 

 7.23 

 8. 53 

 9.31 

 7.48 

 10.48 

 12.25 

 13.50 



Year 



93. 06 

 91.42 

 110.67 

 152. 04 

 136. 19 

 143.42 

 164.19 

 183.41 



Table 9b. — Maximum amounts of precipitation in inches (19^6) 



