451 
Relating to Rubber,” Rule No. 7 of 1905, in Govt. Gaz. S. Nigeria, 
yielding twice the amount collected by the ordinary herring-bone 
and four times that by means of vertical incisions. 
10, p. 9) 
the “‘ para," the *' secure,"' the “‘ sculfer,’’ the ‘‘ Christy " [on the 
incision method] and *'Messrs. Walker and Sons" knife, were 
For coagulation various methods have been tried and found 
more or less effective, including chemicals—carbonate of potash 
and acetic acid, formalin, hydrochloric acid, hydrofluoric acid 
convenient size. Lump 
milk and the difficulty in propag this elean and dry lies in the 
large masses being treate : > advi 
able to deal with sufficient only to make the desired size of biscuit. 
The rubber is finally well washed and dried under cover—the hot 
sun and excessive light is believed to be the cause of “ tackiness.’ 
In the Mamu Reserve 10 biscuits have been found to weigh one 
FF 2 
