440 
this purpose the figures of results obtained in 1906 up to the end of 
July have been included in the tables. 
During the experiments, in addition to weighing carefully the 
dry rubber obtained from the separate groups of trees, the latex 
itself was first measured and this part of the experiments furnishes 
the most interesting and important information in connection with 
the experimental work of the year. The results show that there is 
much difference in the amount of rubber obtained from the same 
quantity of latex at different times in the year, at different times 
of the day (i.e. at morning and evening tappings) and from the 
same groups of trees when they have had a sufficient interval oi 
rest, and when they have not. The story of this variation in the 
production of caoutchouc will be more clearly understood if we 
sketch briefly the following chapter in the life history of the trees. 
A Chapter in the life history of Hevea braziliensis in Malaya. 
The fruit periodicity of Hevea braziliensis in the Singapore 
Gardens from 1897 to 1905, or a period of nine years is shown in 
the record of returns of seeds procured (see page 44 1 )- The seeds 
gathered up to the end of October, 1906, is entered on the return 
but not included in the total for the preceding nine years. It should 
be remarked that this Return, although not strictly accurate in all 
details, is fairly approximate, and from this record we extract the 
following monthly returns for this period, arranged according to 
abundance of crops: — 
September ... .. • 3 2 4 , 5 r 5 seeds. 
October 
’March 
November 
August 
April 
February 
December 
291,430 
148,050 
85,870 
79,600 
56,314 
55,^00 
35,802 
January 
July 
June 
May 
32,924 
29,650 
28,700 
28,097 
