[886] Valmont de Bomare, Dict. d’Hist. Nat. i. (1775) 387.
[887] Botanische Zeitung, xv. (1857) 316.
[888] Motley in Hooker’s Journ. of Botany, iv. (1852) 201.
[889] Life in the Forests of the Far East, ii. (1862) 152.
[890] Zeitschrift der Gesellschaft für Erdkunde zu Berlin, v. (1870) 435.
[891] Report to the Under Secretary of State for India, on the investigation and collecting of plants and seeds of the india-rubber trees of Pará and Ceara, and Balsam of Copaiba. March 1877,—8.
[892] See figure in the above Report.
[893] We saw such as this which had been imported into London in 1873; though regarded by the dealers with suspicion, we are not of opinion that it was sophisticated.
[894] Such is the case with some very authentic specimens collected for one of us in Central America by De Warszewicz, but other samples which we had up reason to suppose adulterated, left a certain amount of white residue when treated with twice their weight of alcohol sp. gr. 0·796.
[895] Flückiger in Wiggers and Husemann’s Jahresbericht for 1867. 162, and for 1868. 140.