EUCALYPTUS GLOBULUS. 



Australis, C. indivisa, Casuarina qnadrivalvis and some other conspicuous plants of Australia and 

 New Zealand, as observed by the Rev. D. Laudsborough. Nevertheless E. globulus among tall 

 congeners cannot rival E. pauciflora, E. amygdalina and E. Gunnii in hardiness. Dr. Aberg 

 if he accurately identified the species, found at the mouth of the La Plata-River the following 

 Eucalypts nearly or fully as hard}' as E. globulus, aud all these also of comparatively rapid 

 growth : E. obliqua, E. Leucoxylon, E. heemastotna, E. largiflorens, E. longifolia, E. cornuta, 

 E. saligna, E. resinifera, E. corymbosa, E. diversicolor, E. tereticornis and E. rostrata, while 

 E. calophylla, E. marginata, E. niaculata and E. macrocarpa perished there from frost ; in celerity 

 of growth E. globulus and E. corymbosa carried there the palm, E. diversicolor and E. obliqua 

 coming next. Prof. Goeppert, Dr. Raveret-Wattel and others observed, that E. globulus will 

 bear a severe degree of cold transiently (about 20 F.), if it lasted not sufficiently long to 

 congeal the sap to any great extent, and provided also, that the ne'.v wood was well matured and 

 the spot of growth a dry one. 



This species produces flowers during our cool season. 



The middle-bark of E. globulus is without reservoirs of oleo-resin and Kino ; the stone-cells 

 are comparatively few, larger than the surrounding parenchyma ; small interspersed bast-bundles 

 occur and occasionally cork-cells. The inner-bark has the cells of parenchyma very small ; the 

 bast-rays are irregular and very narrow ; the stone-cells are not observable, but numerous cork- 

 cells occur. Accurate histologic researches on Eucalyptus-barks, commenced on material furnished 

 by me to a leading Austrian Phy to- Anatomist, Dr. Josef Moeller, and now extended here, need 

 yet to be much further continued, before the particular development of the cortical layers, so 

 characteristic for many species, will be fully understood as well in its normal as aberrant phases. 



The main anatomic characteristics of the wood are as follows : The vascular tubes on longi- 

 tudinal sections become apparent as short dark lines or pores, often somewhat twisted ; they are 

 isolated, but particularly numerous where the annual layers meet ; their lumen is at an average 

 O015 m.m. and they are generally filled with cellular substance ; their dots are similar to those 

 of many other Eucalypts ; the medullary rays are very numerous, consisting of one, two or three 

 rows formed of comparatively ample cells, each filled with a brownish mass ; medullary spots 

 none ; the parenchyma cells are not numerous, and their walls thin ; the wood-fibres are usually 

 curved, their apex is frequently forked, which is one of the causes that the wood is not very fissile ; 

 their middle measures about - 02 m.m. in breadth and their walls are strongly thickened. 



The timber of E. globulus is of a rather pale color, hard, heavy, strong and durable, more 

 twisted than that of E. obliqua. E. amygdalina and many other fissile kinds, but not so inter- 

 locked as that of E. rostrata, E. melliodora and most of the species termed here Box-trees. Its 

 specific gravity varies from -098 to 1-108. In transverse strain its strength is about equal to 

 English oak. In durability it occupies a medium position among that of its congeners, being 

 more lasting than that of most so-called White Gum-trees and all Stringybark-trees, but inferior 

 to that of the Red Gum-tree, Ironbark-tree and Box Eucalypts, especially when in contact with the 

 soil or with water. In house-building it is one of our best timbers for joists, studs, rafters or any other 

 heavy scantlings, and is very largely used for this purpose. The Australian Lloyds place the wood 

 of the Blue Gum-tree in the second class of colonial timber, E. rostrata, E. Leucoxylon and E. 

 marginata ranking first. If the different parts of a vessel are constructed of any of the three 

 latter species, it is classed A for twelve years ; the following is the number of years assigned to 

 sound wood of E. globulus : for floors of ships, first and second futtocks, main- and rider-keelson, 

 beams and hooks, 10 years ; for third futtocks and top-timbers, stem- and stern-posts, transoms, 



