XIV, 5 Yates: Growth of Hevea Brasiliensis 519 
TABLE XIII.—Growth of trees in the Singapore Botanic Gardens.” 
[Age of trees, 14 years.] 
Girth in— 
Registered No. of tree. Remarks. 
1904 | 1905 | 1906 | 1907 | 1908 
ob» PASS Re ee Seapine mt re 97.8 | 102.9} 108.5) 118.6! 121.9 | Slope. 
Desig Si eee ca teceri too ol. te 81.3 88.3 93.3 96.5 Do, 
sty | PORES Esteem tin ican eager oe 60.9 62. 2 66.0 68. 6 71.1 Do. 
Booming egy et ecw a 136.5} 147.0} 147.8} 151.1} 152.4 | Top of hill. 
gs eee Pen geaget eR oa 158.7} 159.7 | 166.1] 174.0] 182.9 | Top of hill, 100 feet tall. 
a 5 a as aes 86.4 88.9 90.5 93.7 96.5 | Slope. 
boy < Sens AE ae ae aeeeabet ast eS 87,0 92.7 96.5 | 101.6! 104.1 Do. 
POO  sccneicu ret bad oc ae 85.1 98.7} 105.1} 106.1} 108.0 Do. 
1 Res Sepa ae ee 158.4} 1738.0) 181.3] 191.8{ 200.74 Top of hill. 
2 From Agr. Bull. Straits & F. M. S. 7 (1908) 254. 
The record extends over a period of four years and indicates 
an average growth during this period of 5.38 centimeters per 
year. The most rapidly growing tree, No. 1281, shows a growth 
of 10.5 centimeters per year, almost double that of the average. 
In Table XIV are given measurements of trees up to 3 years 
old. The best growth indicated for that period is 23.9 centi- 
meters, which is slightly less than that attained by trees of the 
same age at Basilan. 
TABLE XIV.—Open-planting experiments. Planted 7.5 by 3.75 meters (25 by 
12.5 feet).* 
Stumps 2 months from Stumps 6 months from 
F nursery. nursery. 
Seeds sown at stake, 1907. 
Seeds sown in nursery, Octo- || Seeds sown in nursery, Octo- 
ber, 1907. ber, 1907. 
> ° 
om. in. em, in. cm. in. 
October, 1907 ___ saat plant-|| December, 1907_- on ef — April, 1908_...- 2.41 #8 
October, 1908...’ 38.1 3; || December, 1908-.| 6.5 2%5 |; April, 1909.__.--| 7.9 34 
October, 1809. 16.1 6% || December, 1909__| 14.2 58 || April, 1910_-.--- 23.0} 9d 
October, 1910_._! 23.6 9,3; || December, 1910..| 23.9 92 
* From Report of Director of Agriculture F. M. S. in Agr. Bull. Straits & F. M. S. 10 (1911) 
255-256. 
Other records from Malaya indicate in some cases more rapid 
growth than those cited. In measurements of certain trees 
on the Bukit Raja Estate in Selangor ® in which five trees (Nos. 
1, 3, 6, 7, 8), all approximately 4 years of age, attained an 
* Agr. Bull. Straits & F. M. S. 1 (1902) 333. 
