EXPLANATION OF THE ILLUSTRATIONS 
Pirate I. Upper figure. Typical rubber-tapper’s 
camp, Loretoyacu River, Amazonas. Here a group 
of five smoke-houses and several balls of smoked 
rubber ready for selling can be seen. 
Lower figure. A rubber-tapper smoking latex into 
balls, Loretoyacu River, Amazonas. This ball, the 
product of about six days’ tapping, weighs about 
25 kilos. The latex is from Hevea brasiliensis var. 
subconcolor. In the Vaupés, latex is coagulated 
with acid and not with smoke, and the rubber is 
prepared in sheets. 
Pare II. Upper figure. Exploiting Hevea brasili- 
ensis var. subconcolor, Loretoyacu River, Amazonas, 
In the “‘trapecio amazonico,’’ trees of this variety 
sometimes attain a diameter of four feet. 
Lower figure. Leaves and flowers of Hevea brasili- 
ensis var. subconcolor, Loretoyacu River, Amazonas. 
Note the brilliance of the leaflets. 
Pirate II]. Upper figure. Hevea guianensis on the 
highland knolls of the Loretoyacu River, Amazonas. 
Lower figure. Hevea guianensis var. lutea, Macaya 
River, Vaupés. 
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