IX. A, 6 



Brown and Matheivs: Dipterocarp Forests 



529 



Table XLIV. — Rainfall and soil moisture,'' forest of Mount Maquiling, 



Laguna Province, Luzon. 



Period. 



Jan. 3 to Jan. 31-.. 

 Jan. 31 to Feb. 28- 

 Feb. 28 to Mar. 28 - 

 Mar. 28 to Apr. 25 . 

 Apr. 25 to May 23.. 

 May 23 to June 20 . 

 June 20 to July 18 . 

 July 18 to Aug. 15 . 

 AuB. 15 to Sept. 12 

 Sept. 12 to Oct. 10 . 

 Oct. 10 to Nov. 7.-. 

 Nov. 7 to Dec. 5 .-- 

 Dec. 5 to Jan. 2—14 



Total - 



Average 



Rainfall. 



Average 



weekly 



soil 



moisture. 



COT. 



5.67 



Per cent, 

 53.3 



3.93 



48.8 



1.87 



43.2 



1.05 



44.6 



11.11 



46.7 



9.21 



48.6 



26.87 



53.2 



35.52 



64.1 



47.35 



58.2 



8.60 



56.2 



17.54 



55.6 



8.88 



56.8 



12.16 



55.8 



189.75 

 14.60 





51.9 



« The record of soil moisture is taken from an unpublished paper by W. H. Brown and 

 A. S. Arguelles. 



Table XLV. — Relative humidity in forest of Mount Maquiling, Laguna 



Province, Luzon. 



Period. 



Jan. 3 to Jan. 31 ... 

 Jan. 31 to Feb. 28 . 

 Feb. 28 to Mar. 28 . 

 Mar. 28 to Apr. 25. 

 Apr. 25 to May 23-. 

 May 23 to June 20. 

 June 20 to July 18. 

 July 18 to Aug. 15. 

 Aug. 15 to Sept. 12 

 Sept. 12 to Oct. 10. 

 Oct. 10 to Nov. 7 .. 

 Nov. 7 to Dec. 5... 

 Dec. 5 to Jan. 2 ... 



Average 



Maxi- 

 mum. 



99.5 

 99.0 

 100.0 

 99.5 

 97.5 

 97.0 

 %.0 

 93.5 

 95.0 

 96.0 

 96.0 

 97.0 

 97.0 



97.2 



Mini- 

 mum. 



85.5 

 80.0 

 74.0 

 68.0 

 71.5 

 73.5 

 82.5 

 78.0 

 77.0 

 79.0 

 75.0 

 86.0 

 86.0 



78.2 



Average 



95.6 

 93.6 

 91.1 

 91.4 

 92.7 

 90.6 

 91.5 

 89.8 

 90.2 

 91.5 

 92.3 

 93.4 

 93.9 



92.1 



Average 

 daily 

 maxi- 

 mum. 



97.3 

 97.3 

 98.4 

 96.8 

 96.4 

 94.9 

 93.4 

 91.5 

 92.4 

 93.4 

 94.4 

 95.7 

 95.6 



95.2 



Average 

 daily 

 mini- 

 mum. 



92.7 

 88.6 

 84.2 

 81.9 

 84.5 

 81.2 

 87.8 

 85.0 

 86.6 

 86.5 

 88.3 

 90.5 

 92.3 



86.9 



Records of evaporation were obtained by means of a Living- 

 ston rain-correcting atmometer."' The evaporating surface in 

 this instrument is a porous clay cup so connected by means 



" Livingston, B. E., A rain-correcting atmometer for ecological instru- 

 mentation, Plant World (1910), 13, 79-82. 



