. Scientific American Volume 47 Numéro 17 (octobre 1882) . terres du Pacifique, rapportsl'existence d'un arbre appréhensile. Il ap-poires d'être une espèce de ficus, allié à l'arbre de Banyan-Tree connu de thewell, qui surcroise de ses branches air racines, thatfind atteindre le sol, et takeroot là, et à leur tour devenir des nouvelles tiges, qui exécutent la même fonction;de sorte qu'un seul arbre,puisse,éventuellement s'exterminer jusqu'à former une forêt complète, dans laquelle les tiges sont unies par les branches l'une à l'autre. De même, l'arrêté en question jette des branches longues et flexibles de tendrils, wh

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. Scientific American Volume 47 Number 17 (October 1882) . lands in the Pacific, reportsthe existence of a prehensile tree. It ap-pears to be a species of ficus, allied to thewell-known banyan-tree, which throwsout from its branches air roots, thateventually reach the ground, and takeroot there, and in their turn become newstems, which perform the same function;so that a single tree, will, eventually extendso far as to form a complete forest, inwhich the stems are united by thebranches to each other. The prehensiletree in question similarly throws out fromits branches long, flexible tendrils, which, touching the ground, do not take rootthere, but twine around any article thatmay lie within their reach. After a timethese (?Mas» branches contract, so that theyfait to reach the ground; but the finger-like processes con-tinue to closely gripe the article round which they havetwined themselves, and which are consequently suspendedin mid-air. In this way, articles of considerable weightmay be literally picked up from the ground and held insuspension.. Aluminum. At the recent meeting of the British Association, Mr.Barlow readapaper On the Mechanical Properties of Alumi-num. This metal is used chiefly as a substitute for silver, but the author had found it to be exceedingly strong in pro-portion to its weight. Experiments had been carefully madefor him by Prof. Kennedy, from which its valuable proper-ties of ductility, tensile strength, and elasticity were fullydemonstrated. This was well illustrated by the compara-tive length of rods of uniform section, but of differentmetals, which could be suspended without rupture, thelengths in the case of steel and aluminum being equal andexceeding all others. Unfortunately it is an expensivemetal, and the process by which it is at present extractedleaves little hope of its use being greatly extended. Sir H.Bessemer said he did not think any metal could be dependedon like the one in question, from the small part its weighttook in produci

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