86 
PETCH 
Rainfall. 
1911. 
1912. 
1913. 
19U. 
Average, 
31 Years, 
laches. 
Inches. 
Inches. 
Inches. 
Inches. 
January 
.. 1*68 
.. 0-39 
.. 22*29 
. . 1-65 
.. 3-58 
February 
— 
.. 0*91 
*45 
. . 1*75 
March 
.. 8-02 
.. 4*74 
.. 3*99 
.. 4*33 
.. 4*96 
April 
.. 3-67 
.. 5*83 
.. 9*26 
.. 5*22 
.. 10*45 
May 
.. 1*43 
.. 4*20 
.. 4*43 
.. 5*39 
.. 6*02 
June 
.. 15*93 
.. 9*79 
.. 7*21 
.. 9*59 
.. 10*26 
July 
.. 8*13 
.. 15*08 
.. 5*54 
.. 5*35 
.. 8*13 
August 
.. 4*85 
.. 4*59 
.. 5*20 
.. 4*50 
.. 6*00 
September 
.. 7*96 
.. 2*44 
.. 2*22 
.. 8*78 
.. 6*72 
October 
.. 12*54 
.. 10*89 
.. 32*03 
.. 14*41 
. . 14*02 
November 
.. 7*85 
.. 9*67 
.. 11*14 
.. 8*77 
.. 9*77 
December 
.. 20*23 
.. 14*84 
.. 16*18 
.. 16*27 
.. 9*18 
References. 
(1) Brown, H. P. — Growth Studies in Forest Trees. 2. Pinus 
Strobus L. Botanical Gazette, LIX., pp. 197-240. 
(2) Ridley, H. N., and Derry, R.— Agricultural Bulletin of 
the Straits and Federated Malay States, IX., p. 258. 
Explanation of Plates. 
Plate VIII . — Growth curves of three untapped trees. 
Plate IX . — ^Growth curves of four trees tapped from October, 
1912. 
Plate X., XI . — Growth curves of tapped trees. 
Plate XII . — Growth curves of the above trees from January to 
April. 
As the vertical lines which indicate the dates of the change in 
colour of the leaf and the full development of the new leaf 
respectively are not clearly indicated on Plate XII., these dates 
are given in the following table — 
No. of 
Tree. 
1912. 
1913. 
1914. 
1 ., 
. Feb. 
11- 
-Mar. 
10 . 
. Jan. 
26-Mar. 
16 . 
— 
2 ., 
. Feb. 
11- 
-Mar. 
10 . 
. Feb. 
9-Apr. 
6 . 
— 
3 . 
. Feb. 
4- 
-Mar. 
10 . 
. Jan. 
5-Mar. 
2 . 
. Jan. 
23-Feb. 
15 
4 . 
. Jan. 
28- 
-Mar. 
10 . 
. Feb. 
9-Mar. 
23 . 
. Feb. 
15-Mar. 
8 
5 . 
. Feb. 
18- 
-Mar. 
24 . 
. Feb. 
9-Apr. 
6 . 
— 
6 . 
. Jan. 
28- 
-Mar. 
10 . 
. Jan. 
5-Mar, 
16 . 
.’ Feb. 
1 5-Mar. 
15 
7 .' 
. Feb. 
11- 
-Mar. 
17 . 
. Mar. 
2-Mar. 
30 . 
. Feb. 
15-Mar. 
15 
8 . 
. Feb. 
11 
-Mar. 
10 . 
. Feb. 
1 6-Mar. 
30 . 
. Feb. 
15-Mar. 
15 
9 . 
. Feb. 
11- 
-Mar. 
10 . 
. Feb. 
9-Mar. 
30 . 
. Feb. 
15-Mar. 
15 
10 . 
. Feb. 
11- 
-Mar. 
17 . 
. Feb. 
16-Mar. 
30 . 
— 
11 . 
. Feb. 
4- 
-Mar. 
10 . 
. Feb. 
9-Mar. 
23 . 
— 
12 . 
. Feb. 
11- 
-Mar, 
17 . 
. Feb. 
9-Mar. 
30 . 
! Feb. 
22-Mar. 
15 
13 . 
. Jan. 
21- 
-Mar. 
3 . 
, . Feb. 
1 6-Mar. 
23 . 
. Feb. 
15-Mar. 
15 
14 . 
. Feb. 
4- 
-Mar. 
3 . 
, . Feb. 
9-Mar. 
23 , 
. Feb. 
15-Mar. 
15 
15 . 
. Feb. 
11- 
-Mar. 
17 . 
, . Mar. 
2-Mar. 
23 . 
, . Mar. 
1-Mar. 
22 
16 . 
. Feb. 
11- 
-Mar, 
17 , 
, . Feb. 
1 6-Mar. 
23 . 
, . Feb. 
15-Mar. 
15 
