250 
From this statement it will be seen that while there is diversity 
in the quantity of latex obtained at different seasons and in different 
years there is also variation in the composition of latex itself. This 
latter variation arises from different causes but no doubt the effects 
of rainfall is an important factor, when — so far as is known — other 
conditions are normal. What the variation amounts to is shewn in 
Table III. It will be seen that during 21 tappings almost daily from 
the same group of trees the volume of latex varied from 114 to 
338 ozs. c/c while the weight of a sheet of rubber prepared daily from 
30 ozs. of the latex varied from 6 to 8 % ozs (avoirdupois). 
EXPERIMENT 4. 
TABLE III. 
Variation in the weight of dry rubber prepared from an uniform 
quantity of latex. 30 ozs c/c. obtained daily and weighed dry sheet. 
Date 1909. 
Rain fall 
Inches parts. 
Total latex 
obtained Daily 
Dry weight of 
Sheet of 30 ozs 
latex after 
coagulation daily 
Remarks. 
ozs c/c. 
(ozs. avoirdupois) 
Dec. 29th. 
60 
114 
6 
„ 30th. 
187 
6 
From the latex 
„ 31 
... 
145 
7 
obtaided daily 
30 ozs c/c. was 
1910 
kept apart and 
weighed dry in 
Jan. 3 
38 
210 
7 
the form of Sheet. 
» 4 
85 
200 
6 
„ 5 
43 
252 
7 V 2 
» 6 
47 
270 
7 Vi 
„ 7 
29I 
8 
„ 8 
304 
7 Vz 
„ 10 
338 
854 
» II 
272 
7 Vz 
„ 12 
276 
6J4 
» 13 
36 
268 
7 V 2 
„ 14 
340 
7 % 
„ 15 
30 
304 
6 U 
„ 16 
288 
8 
,» 1 7 
316 
&/ 2 
,, 18 
326 
6 V 2 
» 19 
89 
308 
7 
„ 20 
292 
m 
„ 21 
284 
6 H 
