YIELD AND DENSITY OF LATEX 



87 



ri pounds of lump and scrap, making a total of 4*4 

 pounds of dry rubber in six months of twenty-five 

 working days each. At the near-by estate of Lembranga 

 two men tapping 300 trees obtained a daily average of 

 latex of 6,000 c.c. each; this yield, on the basis of 150 

 working days in the season, is equal to 578 pounds of 

 dry fine rubber, and 1*73 pounds of lump and scrap, 

 an aggregate of 7*51 pounds of dry rubber per tree per 

 annum. These trees were tapped on the single- V plan 

 with the gouge. 



The following details, extracted from the records 

 kept at Santa Maria, are instructive and interesting in 

 regard to density and yield with both gouge and 

 machadinho tapping; they may be relied upon as 

 approximately correct, and are fairly representative of 

 the average conditions, in this section of territory, of 

 old-established properties regularly worked for the last 

 quarter of a century : 



Note. G.V. stands for gouge tapping with separate Vs. 



G.H. ,, ,, ,, ,, herring-bone system. 



M. ,, machadinho tapping. 

 J. ,, jebong tapping. 



The average yield of the five sets of gouge tapping is 30 c.c. first 

 latex per tree. 



The average yield of the five sets of machadinho tapping is 17 c.c. 

 first latex per tree. 



