Kirk wrote:

> http://www.hort.purdue.edu/newcrop/duke_energy/Copaifera_langsdorfii.html
>Uses
>That the oleoresin called copaiba could be obtained by incising the trunk
>was first reported in England in 1625, in a work published by Purchas, "...a
>single tree is said to yield about 40 litres." (Grieve, 1931, reprinted
>1974). Quoting nobel-laureate Calvin, Maugh says (1979), "Natives ... drill
>a 5 centimeter hole into the 1-meter thick trunk and put a bung into it.
>Every 6 months or so, they remove the bung and collect 15 to 20 liters of
>the hydrocarbon. Since there are few Rabbit diesels in the jungle, the
>natives use the hydrocarbon as an emollient and for other nonenergy-related
>purposes. But tests have shown, he says, that the liquid can be placed
>directly in the fuel tank of a diesel-powered car."

The Diesel Tree. We never hear any more about it. Until Marc sent me 
this - a bit more about Copaifera langsdorfii, and about Calvin:
http://journeytoforever.org/biofuel_library/liquefaction.html
Liquefaction

Keith


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