Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 12. caused by the irregular wrinkling of the two oppo-site walls when in contact. Very important investi-gations on this subject have been commenced inManchester. Are there really any distinguishablemicroscopic differences between Sea Island andEgyptian, New Orleans and African, or betweenBrazilian and Surat ? Vascular fibres are derived either from the innerbark (liber) of exogenous or the vascular bundlesof the leaves of endogenous plants. Each of thesegroups would possess th
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 12. caused by the irregular wrinkling of the two oppo-site walls when in contact. Very important investi-gations on this subject have been commenced inManchester. Are there really any distinguishablemicroscopic differences between Sea Island andEgyptian, New Orleans and African, or betweenBrazilian and Surat ? Vascular fibres are derived either from the innerbark (liber) of exogenous or the vascular bundlesof the leaves of endogenous plants. Each of thesegroups would possess their own peculiar Fig. 13. a. Flax ; b. Jute. The most important of liber-fibres is Elax, obtainedfrom the common flax plant (Lhmm usitatissiriwm).This possesses a variable market value according to country or climate of production. It is natural toinquire whether the microscope can detect differencesbetween Irish and Belgian, or between Egyptian andSpanish flax. In I860, Dr. Eorbes Watson com-municated an important paper to the Society ofArts, in which the microscopic character of vege-table fibres received more attention than had everbefore been given to the subject, and since thatperiod nothing has been attempted in advance. Thewoodcuts used to illustrate these observations wereprepared for that occasion, and have been kindlyplaced at our disposal by Dr. Watson. The micro-scopic characters we are about to give are thosewhich then accompanied the illustrations. fibre (fig. 13, a) presents at varying dis-tances certain characteristic cross markings, theoutlines of the fibres are hard and smo
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
