16 



THE INDIA RUBBER 'JVORLD 



[October i, 1902. 



finished product. [This is a subject on which The India 

 Rubber World would like further details.] 



The Caucho tree is now generally affirmed in these regions 

 to be Castilloa elaitica, but in view of some remarks in The 

 India Rubber World on the Mexican rubber tree (the spe- 

 cies first designated as Castilloa tlastlca), it would seem that 

 the classification of the Brazilian rubber species should be re- 

 vised. Among the Heveas I am acquainted with at least 

 twelve well marked species, which give a very different pro- 

 duct, and there is a kind of Manihot here which gives a rubber 

 very different from that from the maniyoba {Manihot Glaziovit) 

 of Ceara. l. g. 



Manaos, August i6, 1902. 



BOLIVIAN RUBBER STATISTICS. 



To return to Senor Ballivian's report, quoted on a preceding 

 page, the following statement is given of the total exports of 

 rubber from Bolivia for twelve years past, exclusive of 1899, for 

 which no complete returns exist: 



Pounds. Pounds. Pounds. 



1S90 640,800 1894... .1,391,500 1898 6,943,100 



1891 759,000 1895 ....1,804,902 1899... . 



1892 7q9,48o 1896 2,509,566 1900 7,691,728 



1893 868,600 1897 3,683,275 1901... .7,623,138 



From the Boletin de la Oficina Nacional of Bolivia of June 

 30, 1902, it appears that the exports of India-rubber, including 



Caucho, during the year 1901 amounted to 7,623,138 pounds, 

 distributed by custom houses as follows, values being stated in 

 bolivianos {^ig.'i centsj. 



Pounds. Value. 



a Acre 5.054,436 6,474,0^040 



^ Villa Bell.i t,74q 205 1,600,843.72 



c La Haz 627,783 863,74190 



rf Suarez 167,543 T95.914.60 



e Oruro 24,171 17,232.99 



Total 7,623,138 9.151,823.61 



a Outlet for the rubber of the Acre district ; shipped through Brazil to 

 Man.'ios. 



6 At the mouth of the river Bcni. Rubber shipped via the river Madeira to 

 Manaos and Pard. 



c Rubber shipped via Lalce Titicaca to MoIIendo, on the Pacific coast. 



d On the river Paraguay, discharging through tlie Parana into the rio de la 

 Plata. Rubber produced in the department of Santa Cruz. 



t In the department of Oruro, south of La Paz. Rubber shipped to the Pa- 

 cific coast. 



The exports of rubber through MoIIendo during 1901, in- 

 cluded in the above total, according to the same report, were 

 as follows : 



To Great Britain 483,956 pounds. 



Germany 98,737 " 



France 8,649 " 



United States 28,629 " 



Total 619,971 " 



The exports in the last iine were to San Francisco. 



RUBBER CULTURE AND EXPLOITATION. 



YIELD OF RUBBER TREES IN PERAK. 



IN the annual report for 1901 on the government gardens 

 and plantations of Perak, Taiping, Superintendent Robert 

 Derry records his experiments in tapping Pard rubber trees. 

 The method adopted involves a vertical incision in the 

 bark extending from the base some 4 feet up the trunk, with 

 five oblique branch incisions on each side, as 

 indicated in the illustration. Mr. Derry 

 tapped two trees by making three sets of 

 incisions in each — each set extending over 

 something less than one-third of the circum- 

 ference of the tree — and compared the results 

 with that from a tree cut with only one set 

 •of incisions. He is of the opinion that very 

 little more rubber is obtained from the 

 more extensive tapping. The yield of rub- 

 ber from the first two trees, of the same age 

 and size, was 28J4 and 26^2 ounces, respectively, while from 

 a single set of incisions in a tree slightly older and larger, 3234" 

 ounces of rubber were obtained. The tapping was done in 

 September last, the same incisions being reopened day after 

 day, in the case of the first two trees eleven times, and in the 

 case of the third tree, eight times. Two of the trees, ten years 

 old, were 17 and 18 inches in diameter, respectively, three feet 

 from the ground, and the third, fourteen years old, was 20 

 inches. 



Thirty-two Pard rubber trees in the Taiping garden, about 12 

 years old. yielded 125 pounds of dry rubber, or an average of 

 3.9 pounds each. It appears that the best season for tapping 

 is between June and November. The latux seems to exude 

 most freely in wet weather, the occurrence of which varies in 

 different years.^=Two rambong trees (Ficus elastica) about 

 twelve years old, yielded 20 pounds of rubber. Four such 

 trees in the garden yielded 70 pounds of rubber between De- 

 cember, 1900, and January, 1901. 



TO EXPLOIT RUBBER IN ECUADOR. 



The Ecuador Rubber and Development Co. has been organ- 

 ized at Winnebago City, Minnesota, with $1,000,000 capital, 

 under an Arizona charter, to exploit natural rubber resources 

 in Ecuador. The president is O. C. Retsloff, a jeweler and cap- 

 italist of Winnebago City. The vice president and assistant 

 manager is E. T. Crowther, who has been a merchant in Win- 

 nebago City for several years, and will go to the company's 

 property, near Esmeraldas, Ecuador, to assist in the direction 

 of the business. The i.t.o.xtX.'A.xy, J. Henry Cross, is a merchant 

 at Amboy, Minnesota, and the treasurer is the Hon. David 

 Secor, a prominent citizen of Minnesota. The resident mana- 

 ger at Esmeraldas is Carl O. Retsloff, a relative of the presi- 

 dent of the company. 



GROWTH OF PARA RUBBER TREES IN SELANGOR. 

 The Straits Agricultural Bulletin (June, 1902) presents a 

 photographic view of eight Pard rubber trees under cultivation 

 on the Bukit Rajah estate, with a statement of their age and 

 dimensions as made by F. A. Calloway, as follows : 



No. Planted. Girth. Height. 



1 April, 1898 19 50 in. 31 ft, 8 in. 



2 End of 1898 12 " 36 ft. 



3 April, 1898 23 " 33 ft. 



4 Do 19.25 " 36 ft. 



5 End of 1899 9 " 27 ft. 



6 April, i8q8 19 " 31 ft. 6 in. 



7 Do 14.50 " 35 ft. 8 in. 



8 Do 18.25 " 36 ft. 6 in. 



SAN MARCOS RUBBER PLANTATION CO. 



[Plantation near Palengue, state of Chiapas, Mexico. Oftices: No. S17 Ashland 

 block, Chicatio, Illinois. J 



Incorporated July 15, 1901, under Illinois laws; original 

 capitalization, $to5.ooo. Own 21,000 acres, connected through 

 the navigable river Chacamax, a branch of the Usumacinta, 

 with the gull of Mexico. The first development relates to 

 1000 acres, to be planted in rubber, 200 trees to the acre, no 



