352 
* The richest zones as at present known are along the banks of 
all the southern tributaries of the River Amazons, and on the 
islands in the main stream and near Pará. 
“ The most prolific ok is on the River Aquiry or Acré, one of 
the tributaries of the River Purüs. Here 100 trees yield as much 
as one ton of rubber per annum 
* The northern tributaries of the Amazons do not ocn much 
rubber. Of these, the River Negro produces the m The 
large stores of rubber. The Hevea is known to exist on the banks 
of the Japura, but that district has not yet been opened u 
BOLIVIAN RUBBER. 
The following interesting particulars respecting the yield of 
as rubber in Bolivia are taken from a Report to the Foreign 
ce (F.0., Annual, 1897, No. 1841) by Mr. Consul A. St. John :— 
“ Nearly the whole of the india-rubber cc ratam in gus goes 
ol. 
to England viá Para. On the spot it is worth from 22 to 
per arroba of 25 lbs. Thro ough the Bolivian Mision house a Villa 
Bella on the Sgen bee 69,040 arrobas were exported in 
1894, viz., 63,663 arrobas of eei eet vide 5,977 arrobas of the 
inferior kind know die eee 
* During that year, pu E v" arrobas are said to have been 
exported through La z (Puerto Perez), whilst 3,000 or 4,060 
arrobas are said to e bea exported through Puerto Suarez on 
the Paraguayan frontier. Hevea brasiliensis, the tree which yields 
this warnah sap, abounds in the virgin forests of Bolivia. 
* [f these figures be correct, and no contraband trade in that 
article be carried on, the annual production may be MEO 7 
present at about 850 tons. The duty on fine rubber is 1 Bol. 
arroba and 50 c. on sernamby.” 
Some Bolivian rubber is shipped from the Port of Mollendo on 
the Peruvian coast. It is brought by rail from Lake Titicaca, and 
obtained from that portion of Bolivia which lies above the navi- 
gable portions of the River Beni. “Mollendo rubber” has only 
made its appearance during the last three or four years. It takes 
k with good Para rubber, and commands almost identical 
1898, is mentioned :—* Mollendo ” : 7 packages sold, fine, 3s. 1134. ; 
entrefine gutty, 3s. 10d. ; negrohead, good, 3s. 22d. 
INTRODUCTION OF PARA RUBBER TREE TO THE OLD WORLD. 
The introduction of the maben yiee trees of tropical 
America to British Possessions in the East was an enterprise ir 
which, more than twenty years ago, Kew took an active part. 
The expense was E borne by the Government of India. 
The record of the steps taken in regard to Para rubber is given 
in the Kew Viren (1875, p.7; 1876, pp. 8 and 9; 1877, p. 15, 
and 1878, p. 1 
