290 



THE INDIA RUBBER WORLD 



[March 1, 1912. 



able. 4. In a tapping period the main yields of latex and of 

 rubber are obtained in the first two or three tappings. The 

 tapped parts of the trees run practically dry of latex in from 

 three to six successive periods. S. No signs of "wound response" 

 have been observed, and in all probability it does not occur in 

 Sapiuin Jenmanii trees of mature age. 6. When the lower parts 

 of the trunk of a repeatedly tapped tree are practically ex- 

 hausted of rubber-yielding latex the higher parts of the trunk 

 may yield iatex in relatively large quantities. While the rubber 

 from the latex of the lower part of the trunk may be very 

 tacky or more or less resinous and coagulate with difficulty, that 

 yielded by the upper parts is of very good quality. 7. In 

 practical tappings of the Sapium Jenmanii trees of mature age 

 it is advisable to tap as great lengths of their trunks as possible 

 at one operation and not to confine the tappings to the lower 

 parts of them. 8. The wounds made in the bark of the trees 

 during tapping have been found to heal very slowly and un- 

 satisfactorily. 



SOME INTERESTING FIGURES. 

 Some figures will illustrate the foregoing. The average yields 

 of dry rubber per tree during the years 1908 to 1911, from trees 

 over 30 inches in girth at three feet from the ground, were as 

 follow: September, 1908, 8.33 ounces; October, 1909, 5.16 

 ounces; March, 1910, 1.83 ounces; August, 1910, 1.93 ounces; 

 November, 1910, 1.08 ounces. "The proportion of rubber in the 

 latex of Sapium Jenmanii appears to vary considerably," says 

 the director. "The latex obtained in 1908 yielded about 18 per 

 cent, of dry rubber; that of trees tapped for the first time in 

 1910 contained 15 per cent. ; while that yielded by trees which 

 had been subjected to tappings during several periods contained 

 about 11 per cent." The attention given to the subject by the 

 department, aided by the Bacteriological Department, has not 

 resulted in an explanation of the production of "tackiness" in 

 Sapium rubber. Tlie trees are now to be given a prolonged 

 period of rest from tapping in the hope that they will recover 

 the power of yielding — commercially — valuable rubber in fair 

 quantity. The question of clearing more of the land at the Re- 

 serve and planting it with Para is under consideration. Some 

 years must elapse before definite results are forthcoming, but 

 when they are they should be instructive. Sapium, however, 

 appears to be under a cloud at the present time. 



RETURNS OF THIRTY-FIVE PROMINENT ENGLISH 

 RUBBER PLANTING COMPANIES. 



A S illustrating the progressive rate of increased yield of 

 ■** eastern rubber plantations, a table (recently published by 

 the "Gummi-Zeitung"), summarizing the returns of yields dur- 

 ing the last five years, of 35 prominent English rubber planting 

 companies, is of interest. It is, moreover, in harmony with the 

 returns of planting by 43 companies, quoted by The India Rubber 

 World in November, 1911 (p. 66), which in 1905 had shown 

 1,401,215 trees and which number had been successively increased 

 to 13,377,928 in 1911, more than a nine-fold increase in six years. 

 The subjoined table shows an increase in the yield of 35 com- 

 panies (including 19 which appear in both returns), from 1,186,- 

 450 pounds in 1907, to 9,451,459 in 1911, or an eight-fold gain 

 in five years ; being practically on the same basis of development 

 as in the other case. 



In the later table an interesting comparison is made between 

 recent 1911 estimates and results. The total yields of these 35 

 companies for 1909 had been 3,759,712 pounds and for 1910 

 6,931,434 pounds. The estimates for 1911 aggregated 8,255,900 

 from 29 companies, representing for the 35 about 9,250,000, while 

 the actual results last year for 35 companies aggregated 9,451,459 

 pounds. 



While these returns only deal with about one-sixth to one- 

 fifth of the total number of far eastern companies, they include 



the most important concerns ; producing, as has been estimated, 

 a large share of the total output. 



FIVE YXARS- YIELDS OF PEOMINENT ENGLISH EUBBEE PLANTIKG 

 COMPANIES. 



Yield. Yield. Yield. Yield. Estimate. Yield. 

 Company. 1907. 190S. 1909. 1910. 1911. 1911. 



Lbs. Lbs. Lbs. Lbs. Lbs. Lbs. 



Harp'enden (Selan- 



gor; Rub. Co 5.81S 21.153 108,341 200,000 220,841 



Kapar Para Rub- 

 ber Co 24,023 169,610 335,000 330,890 



Sungei Kapar Rub- 

 ber Co 22,127 37,150 114,970 225,462 300,000 338,400 



Seafield Rub. Co 43,746 201,405 300,000 300,472 



Sungei Wav (Se- 



langor) Rub. Co 13,594 71,936 175,000 178,396 



Linggi Plantations 110,740 284,873 545,390 878,754 1,000,000 1,064,500 

 Consolidated Ma- 

 lay Rub. Estates. 63,615 111,585 215,893 338,655 380,000 395,850 

 Damansara (Selan- 



gorj Rub. Co.. 57,376 124,610 203,007 314,466 400,000 390,726 

 Highlands & Low- 

 lands Para R. Co. 193,507 222,287 341,986 511,724 575,000 637,449 

 Labu CF. M. S.) 



Rubber Co. ... 24,582 24,127 86,573 203,696 325,000 265,250 

 Edinburgh R. Es- 

 tate (Selangor) 29,264 82,876 119,700 122,123 



Shelford R. Estate 11,584 23,828 28,963 103.104 150,000 142,200 

 Sungei Choh Rub- 

 ber Estate Co 2,258 10,200 52,025 80,341 



P. P. K. (Ceylon) 



Rubber Estates. 14,800 29,200 54,474 62,500 80,000 80,441 

 Batu Caves Rub- 

 ber Co 4,312 16,585 45,769 173,127 250,000 258,000 



Batu Tiga (Selan- 

 gor) Rub. Co.. 6,365 7,978 35,500 96,432 140,000 160,858 



Selangor Rub. Co. 120,524 189,979 326,654 451,511 469,759 



Seremban Rubber 



Estate Co 109,054 134,848 22S.626 384,440 430,000 364,188 



Ceylon (Para) Rub- 

 ber Co 11,457 64,470 



Golconda Malay 



Rubber Co. ... 18,722 35,103 96,290 178,315 200.000 206,011 

 Sunnvgama (Cey- 

 lon) Tea Est. Co. 1,500 2,60,S 20,825 97,719 150,000 203,600 

 Ulu Rantau Rub- 

 ber Estates Co 5,503 65,251 137,420 



Klanang Produce 



Co 18,886 39,729 93,700 150,000 167,245 



Kuala Selangor 



Rubber Co 40,027 170,000 168,692 



Ledbury Rubber 



Estates 8,765 22,597 65.979 124,178 175,000 182,440 



St. George Rubber 



Estates 5,719 23,887 63,011 150,000 140,040 



General Ceylon R. 



& Tea Estates. 19,815 26,283 38,570 88,312 179,910 



Bandarapola Cey- 

 lon Co 4,314 37,528 75.000 90,050 



Pataling Rub. Es- 

 tates Syndicate. 58,064 80,922 152,000 323,065 382,500 334,082 

 -'Vnglo Malay Rub- 

 ber Co 224.778 350,688 517,550 673,132 750,000 772,107 



Golden Hope Rub- 

 ber Estate 5,591 15,238 51,420 80,940 114,200 109,655 



Lanadron Rubber 



Estates 97,203 181,156 249,247 371,816 400,000 375.841 



Ceylon Tea Plan- 

 tations Co 13,426 25,738 54,548 118,626 200,000 240,120 



Langkat Sumatra 



Rubber Co 4,131 12,520 45,090 99,65* 



Panawatte Tea & 



Rubber Estates 1,152 32,545 89,204 180,000 181.529 



Total 1,186,450 1,985,347 3,759,712 6,931,434 8,255,900 9,451,459 



CONTINUED INCREASE OF EASTERN RUBBER 

 OUTPUTS. 



So FAR as received, the January, 1912, reports indicate a con- 

 tinued increase of Malayan output. The Scottish Malay Rub- 

 ber Co., Limited, harvested 9,519 pounds, against 5,237 for 

 January, 1911. The Riverside (Selangor) Rubber Co., 

 Limited, reports 10,221 pounds, against 2,820 pounds for the 

 same month last year. Returns from 11 other leading companies 

 for January, record in the aggregate 277,806 pounds, as com- 

 pared with 170,123 pounds for January, 1911. 



Ceylon companies also make favorable reports. The Bam- 

 brakelly Tea and Rubber Co., Limited, reports for January, 1912, 

 an output of 7,014 pounds, while the figure of the ten months 

 ended January was only 39,025 pounds. The Sapumalkande 

 Rubber Cn. records an output of 15,748 pounds, against 6,257 

 for January, 1911. 



