May, 1910.] 



397 



Saps and Exudations. 



" Plantations.— At present the planta- 

 tions of M. dichotoma are rather young 

 and only the oldest are ready for 

 tapping ; but from the two other species, 

 which have been known longer, a satis- 

 factory amount of rubber is now being 

 brougnt on to the market. In the plan- 

 tations which are laid out in quite 

 primitive manner, the seeds are planted 

 in rows two metres apart, making 2,500 

 trees to the hectare (2'47 acres). Other 

 plants may be grown between the rows 

 during the first year. With regard to 

 tapping, M. piauhyensis is ready in the 

 third year, and the other two species 

 may be tipped in their fourth year 

 of growth. The yield of rubber from 

 a single tree of M. dichotoma in one 

 year can be reckoned at from 100-300 

 grammes with present methods, and 

 this is equivalent to 200-300 kilogs. per 

 hectare. The annual yield of rubber 

 for single trees of M. piauhyensis and 

 M. hepiaphylla is from 500-1000 grammes, 

 which corresponds roughly to about one 

 tonne per hectare." 



RUBBER STATISTICS OF HAWAII. 

 By D. 0. Lindsay. 



(From the Hawaiian Forester and 

 Agriculturist, Vol. VI., No. 12, 

 December, 1909.) 



There are in the islands five in- 

 corporated companies whose principal 

 business is the growing of rubber. 

 Statistics have been obtained from all 

 of these md also from two individual 

 planters, 



No statistics were received from Kauai 

 or Oahu. 



Six reports were received from Maui 

 and one from Hawaii. 



The acreage controlled by these com- 

 panies and individuals is 5,599 acres. 



The acreage planted at date is 1,338 

 acres. 



Acreage planted : Hevea 242 ; Ceara 

 1,092 ; other varieties, 4 ; total 1,338. 



Total trees planted: Hevea, 79,940; 

 Ceara, 349,400 ; other varieties 800 ; total 

 430,140. 



Average of girth: Hevea, 2 years 6, 

 3 years 8 ; Ceara, 2 years 8, 3 years 14. 



Four places practice clean cultivation, 

 Two of them consider it absolutely ne- 

 cessary. One manager reports that it 

 is entirely too expensive and two have 

 not tried it. The approximate cost of 

 cultivation per acre runs from $14 '00 

 to $24'00 per acre for the first year 

 and lighter for following years. 



Inter-crop?, such as corn, potatoes, 

 beans, oats and green vegetables are 

 planted on parts of two plantations, 

 while one manager reports that pine- 

 apple has been tried, but without success, 



One manager reports that inter-crops 

 are profitable only as the returns re- 

 duce the cost of cultivation, but would 

 u ot be profitable otherwise. 



Only experimental tapping has been 

 done and the result is yet undetermined. 

 One manager reports very good results. 



From reports received there are 11,000 

 trees that may possibly be tapped com- 

 mercially during the year 1910. One 

 plantation reports that fertilisers are 

 too expensive to use in quantities enough 

 to be beneficial. Two have not used 

 them. Three places report the use of 

 fertilisers with excellent results and 

 one with fair returns. 



For the purpose of getting statistics 

 for next year that might be more reli- 

 able and more detailed, I would sug- 

 gest that a committee of three be ap- 

 pointed ; one on Oahu, one on Maui and 

 one on Hawaii, and each one attend 

 to the securing of data on the island 

 on which he resides, These could then 

 be tabulated as desired. 



RUBBER CONVENTION. 



(From the Haxvaiian Forester and Agri- 

 culturist, Vol. VI., No. 12, December, 

 1909.) 



The third annual session of the 

 Hawaiiau Rubber Growers' Association 

 was held on Thursday, December 16th ; 

 both morning and afternoon meetings 

 bringing forth a large attendance. The 

 following program was announced by 

 Mr. Fred. L. Waldron, President of the 

 Association : — 



" Hevea or Ceara in Hawaii," Mr. C. 

 J. Austin. 

 "Inter Crops," Mr. L. F, Turner. 



"The Rubber Situation in Hawaii," 

 Mr. W. A, Anderson. 



" Rubber and the small Farmer," Dr. 

 E. V. Wilcox. 



"Rubber and Reforestation," Mr, R. 

 S. Hosmer. 



"Tapping," Mr. P, T. P. Waterhouse. 



" Marketing Rubber," Mr. F, L. Wal- 

 dron. 



" Rubber Enemies," Mr. E. M. Ehrhorn. 



There are in the islands five incorpor- 

 ated companies, whose principal busi- 

 ness is the growing of rubber. Statistics 

 were read from all these and also from 



