Gums, Resins, 14 [Jan. 1907. 



3rd. By mixing the latex with the acid juice of the " Bosasanga" (Costus 

 Laueasunianus. ) 



Q. Has any cultivated rubber yet been exported ? 



A. No. 



According to the published statistics of the exports of rubber from the Congo 

 State there were exported in . — 



Year. Quantity. 



Kilogs. 



1900 ... ... ... 5,316,534 



1901 ... ... ... 6,022,735 



1902 ... ... ... 5,350,452 



1903 ... ... ... 5,917,983 



1904 ... ... ... 4,830,939 



1905 ... ... ... 4,861,767 



Total... 32,300,4 10 for 6 years. 

 English tons. 

 31,823 



(Sgd.) A. NIGHTINGALE. 



Boma, October 12th, 1906. 



Plantation-Grown Rubber. 



Details for Planters.— Revised November, 1906. 



Shape and Form— Biscuits.— About £-inch thick, and 10 @ 12 inches in 

 diameter, thickness and colour as even as possible. 



Sheets.— About £-ineh thick, 2 feet long and 1 foot wide. Rolled by hand or 

 put through rolling machine with either smooth or ribbed rollers and running water. 

 Colour and thickness as even as possible. 



Block or Slab.— 2 to 10 inches thick and 12 to 14 inches long or over and any 

 convenient width for packing. Weight from 5 to 25 lb. each or over, packed in 1 to 

 li cwt. cases. 



Crepe — Long strips 6 to 12 inches wide, sorted as follows : — 



Pile 1. Pale and light amber colour (i.e., crepe made from the No. 1 latex). 

 ,, 2- Crepe made from the scrap, pieces, <fcc, and any rejections from 



Pile 1 can be included. 

 „ 3. Chip Crepe (Brown or Black). 

 Worms.— Pale and Dark should be kept separate and either packed loose in 

 the cases or pressed into large blocks to fit the cases, or in smaller blocks as most 

 convenient. 



Scrap, — When not turned into C r£pe the Scrap should be carefully picked 

 over and all bark, dirt and badly heated or sticky pieces thrown out. Pale and dark 

 should be kept separate. Virgin lumps and scrappy biscuits should also be kept out 

 of the ordinary scrap and sent home separately. 



N.B. — The aim of planters must be to get all their rubber as even in quality 

 as possible — clear, bright and transparent with an even surface — colour light for 

 preference, also as strong and resilient as possible. Uniformity both as regards 

 quality and color are very important, so that manufacturers can rely on their 

 purchases being regular in both respects and not mixed and uneven. All rubber 

 should be dried in dark drying rooms and never exposed to the sun or bright day- 

 light. Non-exposure to light also applies to rubber dried in vacuum driers or by any 

 other patent method. 



