324 The Philippine Journal of Science 1917 
TABLE IV.—Annual diameter growth of Podocarpus imbricatus at top of 
Mount Banahao, Luzon, P. I—Altitude, about 2,100 meters—Continued. 
Diameter class in centimeters. 
No. of tree in class. 80-40. 40-50. 50-60. 
Diam- | Growth.| Diam | Growth Diam- | Growth 
Biot corte ele. Bye cc ores irae = 30.5 0.09 41.0 0.18 50.9| 0.82 
Oe es oe ee 80.6 0.06 al S19, 2828 
§ eee a: 82.0 0.22 68.1; 0.16 
4 EARS SESS ec ae 82.1 A Shee al Uae: 66.1| 0.25 
Cee eee 38.0 0.16 Sian EES Eee 
6. es 83.2 0.385 =m 
| os Sora eee 83.4 0:90 eee 
So a Ss ee 33.8 O28 [ee fe eee 
SS Se 34.8 UA | a Mies tnGae ioaciinngan abacoetency Sa eet 
10. 86.0 G3: ee 
Re ee Or eee Ee RAs SSN RIN: deems Big ena 
a SS er: Seen Shen ey | ae ea Re cance ee aes 
$B os vcrweottuasecuseucncecreshaehsceses = oS 
Wo ci uesess race 
y | CERES SEs 6.5 nar Se SES 
1 ee ee ee eg ote 
Ms a a es ok 
a ee Ea de ee ee a ce 
pS Ss a ee a Ys SSR SS Ss ae es Seg ee oe 
Ws ee <2 
eae ee eee econ hss eee eee ee 
G8 ee oie, Act Wb ds eck bees Se a tc hoe 
23 
WE ead een cade oks oc. oesl ee a, 
Sis AS oS ee See 
WSs ie 
WRG. SAG. GSA ee eee ee ce es ee 
Wa ee ee ee ee 
Co RE Se ss See Sal he Seen Fas Moen 
is ee a i Sot ees Ens Sea Se 
Fg) RSENS SWE Pape etieene a SORE? a ran OG se 028s 0.21 
Seite Oe ee , E Reener The 58 
This curve is shown in fig. 1. The curve indicates that the 
trees undergo a suppression period before they reach diameters 
of 10 centimeters. According to this curve a tree 60 centimeters 
in diameter has an age of 497 years. 
The method used in estimating the age of Podocarpus is open 
to the following objections. All of the trees in the 0- to 10- 
centimeter diameter class were more than 5 centimeters in diam- 
eter, and it is to be expected that they would show a faster 
rate of growth than smaller and more suppressed individuals. 
On the other hand some of the trees in the 0- to 10-centimeter 
diameter classes may be shaded to such an extent that they 
will die before reaching larger sized diameter classes. Such 
