Report on the Caoutchouc of Commerce. Being Information on the Plants Yielding it their Geographical Distribution Climatic Conditions and the Possibilty of their Cultivation and Accumulation

OF THE SOCIETY OF PHARMACY OF PALIS OF THE PHYYOLEEBAL AND MICROGRAPHICAL SOCIETY OF BELGIPM AND OF THE SOCIETY NATURAL AND PHYSICAL SCIENCES OF CARACCAS LATE CCRATOR OF THE MUSEUMS PHARMATICAL SOCIETY OP GREAT BRITAIE WITH TWO MAPS FOUR PLATES WOODOUTS WITH A MEMORANDUM THE SAME SUBJECT BY DR. [...] of the Geographical Department of the India Office I have to tender my thanks for the oversight he has taken in the production of the maps and to my friend Gustay. [...] On the right the Rio Negro with its tribtaries the Uaupês and Casiquiaii the latter connecting the Amazon with the River Orinoco."REPORT ON THE CAOUTCHOUC OF COMMERCE. [...] Wallace draws passes through the centre of the chief district for the Ham: If a line be drawn from about Parahiba to about thd point of junction of the River Araias with the Madeira then continued in a north-west direction to the source of. the Meta (tributary of the Japura) then diverging it in a north-east direction to the junction of the Urichunge with the Orinoco continuing this in an easte [...] Sometimes the yield of the tree is increased by binding the trunk with cords or bands formed of the stems of twining plants (lianas or sip6s) resulting often in the death of the tree.* When a sufficiency of milk has been collected means are adopted to bring about the coalescence of the Caoutchouc.