87 
* 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 part 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 arene of the Amazons do not — much 
rubber. Of these, the River Negro produces the 
quality, hiwévep, Ji is soft. "The River Branco vials very little 
rubber, and the upper part runs through pasture lands and high 
ground which is not suitable for good rubber. Some of the other 
northern giae n have not been explored, and may yet reveal 
large stores of rubber. The Hevea is known to exist on the banks 
of the Tovuti: but that district has not yet been opened up.” 
BOLIVIAN RUBBER. 
The LIT areis particulars yos air d the yield of 
Hevea rubber in Bolivia are taken from a Report to the Foreign 
Office (F.0., Violin 1897, No. 1841) by Mr. crudi St. John : — 
* Nearly the whole of the india-rubber collected in Bolivia goes 
to England vid Para. On the spot it is worth from 22 to 25 Bol. 
per arroba of 25 lbs. Through the Bolivian custom-house of Mos 
Bella on the Brazilian fiontlor, 69,040 arrobas were exported i 
1894, viz., 63,663 arrobas of fine rubber, and 5,377 arrobas of the 
inferior kind known as sernamby. 
“During that year, about 3,400 arrobas are said to have been 
exported through La Paz (Puerto Porez), whilst 3,000 or 4,000 
arrobas are ary to have been exported through Puerto Suarez on 
the Paraguayan frontier. Hevea brasiliensis, the tree which 
yields this valuable sap, abounds in the virgin forests of Bolivia. 
“Tf these figures be correct, and no contraband trade in that 
article be carried on, the annual production may be estimated at 
present at about 850 tons. The duty on fine rubber is 1 Bol. per 
arroba, and 50 c. on sernamby.” 
Some Bolivian rubber is shipped from the Port of Mollendo on 
he Peruvian coast. Itis brought by rail from Lake Titicaca, and 
takes rank with good Para rubber, and com almost identical 
prices. In Messrs. S. Figgis & Co.’s d gar dated the 8th July, 
1898, is mentioned :—* Mo gu xui ages sold, ne, 
3s. 1144. ; ; entrefine gutty, 3s. 10d. ; RT good, 3s. 21d. 
INTRODUCTION OF PARA RUBBER TREE TO THE OLD WORLD. 
The introduction of the ee we fel M 
America to British Possessions in the Eas rprise 
which, M co twenty years ago, Kew t hem an ative: part. The 
expense w irely borne bii the Government of India. The 
ee of the eine taken in regard to Para rubber is given in the 
s (1875, p. 7; 1816, pp. 8 and 9; 1877, p. 15, and 
1878, p. nE 
