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Thus the Maypures carry on a trade of barter with the little loaves of puruma, which is a vegetable fecula, dried in the manner of indigo, and yielding a very permanent yellow colour. The chemistry of the savage is reduced to the preparation of pigments, that of poisons, and the dulcification of the amylaceous roots, which the aroides and the euphorbiaceous plants afford.

An Acacia with very large falcate, glaucous phyllodia, and the Euphorbiaceous Severn-tree, were very plentiful; and Crinum grew in thousands on the sandy flats. After a very hot day, the night was bright and dewy: a light breeze was felt at 8 o'clock, which cooled the air. Jan. 26.

We found several people encamped here, who were engaged in collecting and preparing the rubber, and thus had an opportunity of observing the process. The tree which yields this valuable sap is the Siphonia elastica, a member of the Euphorbiaceous order; it belongs, therefore, to a group of plants quite different from that which furnishes the caoutchouc of the East Indies and Africa.

We did at least eight miles pleasantly well, and slept at Moedaa village. The rocks are still syenite. We passed a valley with the large thorny acacias of which canoes are often made, and a euphorbiaceous tree, with seed-vessels as large as mandarin oranges, with three seeds inside.