India rubber world . water. In using thefirst named pro-cess, the nativessimply boil thelatex, whereuponit begins to coagu-late as soon asebullition takesplace; this meth-od, however, isgenerally unadvis-able, as the coagu-lated mass retainsin its meshes aquantity of serumwhich is oftenconsiderable in quantity, the albuminous parts of which mayafter a time make the rubber pitchy or sticky. In using the second of these methods, the Congo nativesboil water and pour the latex which they have gathered intoIt, and it instantaneously coagulates. The first process givesan inferior quality of latex, s
India rubber world . water. In using thefirst named pro-cess, the nativessimply boil thelatex, whereuponit begins to coagu-late as soon asebullition takesplace; this meth-od, however, isgenerally unadvis-able, as the coagu-lated mass retainsin its meshes aquantity of serumwhich is oftenconsiderable in quantity, the albuminous parts of which mayafter a time make the rubber pitchy or sticky. In using the second of these methods, the Congo nativesboil water and pour the latex which they have gathered intoIt, and it instantaneously coagulates. The first process givesan inferior quality of latex, sometime sticky; the second fur- nishes that beautiful black gum so much appreciated in com-merce. After having obtained thecoagulated mass by the secondmethod, the natives cool therubber by plunging it into coldwater, afterwards strongly press-ing the balls with their hands orct between two leaves, in orderI remove together with theAater and the excess of serum,that portion of the latex whichmay not have »1k-4 iXL, X-M <t^W<*
Size: 1300px × 1922px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookidindiarubberworld31phil
