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tionate weight of about 60 per cent. A separate set of weighings of 
300 seeds per day from tapped trees for 16 days gave an average 
total weight per 1,000 seeds of 8 lbs. 6 ozs. — exactly the average 
given in the other set of weighings. 
Taking the average weight of 1,000 kernels at 5 lbs. 4 ozs. we 
arrive at a total of 426,700 seeds required to produce 1 ton of fresh 
kernels. This figure is in fairly close agreement with that given by 
the late Mr. Carruthers. 
Allowing a loss of 20 per cent, on drying, the weight of 1,000 
kernels will be 4 lbs. 3 ozs. This will give a total of 533,000 seeds to 
the ton of dried kernels. 
The results may therefore be summarized as follows: — 
i. Mr. Carruthers in 1908 found the total weight of 1,000 seeds to 
be 9 lbs. ; of 1,000 kernels, 5 lbs. 6^ ozs. These were taken 
from untapped trees and no allowance made for drying. 
ii. Messrs. Macmillan and Petch in 1908 give the total weight 
of 1,000 seeds at 7 lbs. 13 ozs. ; of 1,000 kernels fresh, 4 lbs. 
8 ozs. ; of 1,000 kernels dried, 3 lbs. 10 ozs. These were 
from tapped trees. From untapped they state the results 
to be closely in accordance with those of Mr. Carruthers. 
iii. The actual figures arrived at here in 1911 on a large scale 
give the total weight of 1,000 seeds, 8 lbs. 6 ozs. ; weight of 
1,000 kernels, fresh, 5 lbs. 4 ozs. ; weight of 1,000 kernels, 
dry, 4 lbs. 3 ozs, ; these are from tapped trees and are 
intermediate between those above. 
Cost per Ton . — Worked out on this basis the cost of collecting 
I ton of fresh kernels will be $15.25 (£l 15s. 7d.) For dried kernels 
it works out at $19.04 (£2 4s. 5d.). Owing to the low cost of collec- 
tion, even the last figure is but little in excess of that calculated by 
Mr. Carruthers for fresh kernels, which was $18.64. 
Attention should be called to an error in Mr, Carruthers’ esti- 
mate of the cost of putting rubber seeds on the market. The freight 
is given at 40 shillings per ton. This is now 40 shillings ($17.14! per 
scale ton of 50 cubic feet, which works out to about 64 shillings 
($28.00) per ton weight of husked rubber seed packed in bags. 
There remain to be considered the cost of decorating, packing, 
and freight to port of shipment. There is at any rate room for a 
decided margin of profit even with husked seeds selling at £10 per 
ton in England. 
Decorticating would have to be carried out in Malaya. The 
article in the Bulletin of the Imperial Institute, above referred to, 
states that “ trials with Miller’s nut cracking machine at the Im- 
perial Institute have shown that this can be used for the purpose; 
but it is necessary that trials on a comparatively large scale with the 
