284 



cox. 



The above tables show that the mean temperature in the Philippines 

 is ver}' uniform, that the maximum and minimum temperatures are not 

 extreme and that the absolute inaximum respectively minimum occurs 

 at approximately the same time of 3'ear for all points. The temperature 

 undergroimd alvrays fluctuates less than the daily extreme, therefore, in 

 the comparison of one region with another the temperature usually drops 

 out of consideration. 



There is probably no place in the whole Archipelago where vegetation 

 gets an insufficient supply of light and sunshine. The average minimum 

 duration of sunshine in Manila for the years 1890-1907 is 140 hours in 

 the month of August. The normal for 1890-190? is shovm by the fol- 

 lowing curve : 



270 

 ^2,0 



§ 



1 



Q 



30 





















1 







^ 



y 



\ 



















/ 







\ 















-^ 









\ 

























\ 







/ 

























/ 

































































































JAU. FEB. MAR. APK. MAY JUftE JULY AUG. ■S£PT. OCT. NOV. 



Fig. 1. — Normal duration of sunsbine in Manila, 1890—1907.^ 



The amount of wind in general is of great importance, indirectly on 

 account of its dr}dng action on the soil and the hastening of transpira- 

 tion, and directly when violent on account of the destruction of the plants 

 themselves. All of these effects are the more pronounced the higher 



'From numbers, Annual Rept. Dir. P. I. Weath. Bur. {1907), 151. 



