at Halle, 0.0019 ; at Haguenau, 0.0032. The mean thickness of the two Salisburias above re- 

 ferred to being 0.0065 m., it is clear that they grow much more rapidly than the Scotch Fir, 

 even in Haguenau, in the climate of Alsace. It would be a great mistake to suppose that there 

 is no parallel between the growth of the Scotch Fir in the north of Europe and that of Salis- 

 buria at Montpellier. In reality, it is in the middle of Sweden that Scotch Fir attains its 

 greatest magnitude. Near Geffle and Upsal, the tree becomes colossal, because it finds itself in 

 a climate that suits it. The summer is, however, too short to enable the annual layers of wood 

 to gain great thickness, and in winter, vegetation is totally suspended.' 



Thus, facts seem to show that Salisburia deserves to be much more generally cultivated than 

 it is. According to M. Martins, and others, the wood is dense and strong — not unlike that of 

 the Orange tree, and by no means resinous; and when the female trees have a male branch 

 grafted upon them, which is easily done, they produce their fleshy fruit in abundance, which, if 

 not of value for useful purposes, have, at least, the merit of being ornamental 



The Perpetual, or Tree Carxatiox. — The appearance of a few plants of this charming flower 

 at the exhibition of the Horticultural Society at Chiswick on Saturday last, reminds me that a 

 few remarks respecting it at this season may possibly prove useful. This variety is commonly 

 called the Winter-flowering Carnation, from the desirable characteristic it possesses of blooming 

 throughout that season. The name of Tree Carnation may be familiar to some, as the plant 

 itself is not of recent introduction, although very few varieties seem originally to have been 

 known, and those have now been entirely superseded by sorts lately imported ; for it is our 

 continental neighbors who have been so successful in raising them, and to whom we are princi- 

 pally indebted for these invaluable acquisitions ; for not only are the varieties now more diver- 

 sified in color, but their growth and habit are altogether improved. In addition to their brio-ht 

 and varied colors, they are deliciously fragrant, a desideratum which cannot be too highly 

 appreciated, some of the varieties being equal in perfume to the common Clove. Persons desir- 

 ous of cultivating this tribe of Carnations should procure nice young plants, say in March, and 

 keep them in a cool frame until the weather permits them to be exposed entirely to the open 

 air ; but, even in spring the lights should be taken off whenever it is practicable. Those who 

 have old plants should strike cuttings about the middle of March, as j'oung plants grow rapidly 

 throughout the summer, and make by far the best specimens for winter blooming. Before taking 

 cuttings, the plants should be put into a warm house, or one that is kept rather close; and 

 those who have not this convenience should put them in the warmest part of the greenhouse ; 

 if this is done, the plants are excited to grow, and if the cuttings are then taken off", they will 

 strike root more readily. Care should be taken to strike only from vigorous plants, and to 

 select strong and healthy cuttings; for if this is not done, and the cuttings are taken from deli- 

 cate and cankery plants, the colors of some of the varieties are inclined to run, besides which, 

 the plants always maintain a sickly appearance. Tree Carnations will supply an abundance of 

 cuttings, as most of the varieties continually throw out a profusion of laterals, which can l)e 

 taken off" at any season without injury to the parent plant ; indeed, taking a few of them off in 

 autumn has rather a tendency to strengthen the flowering shoots than otherwise. To insure 

 cuttings taking root, either late in autumn or in spring, they must be struck in a little heat, but 

 the cutting pots should not be covered with a glass, for if this is done, the cuttings will fog or 

 damp off"; besides which it is not necessary; and if no glass be used, they will want occasion- 

 ally looking over, and any grass carefully removed that is likely to create damp. After the 

 cuttings are well rooted they should be potted singly into, say, 4-inch pots, and kept in a rather 

 close and moist atmosphere until fully established, when they should be gradually hardened off" 

 in a cool frame. At this stage the tops may be pinched out, which will gi-catly assist the forma- 

 tion of nice plants. To those who have not the convenience of suj>plying warmth for striking 

 cuttings during winter, I should recommend their being struck at tlie latter end of summer, to 

 be potted off and kept in a cool frame during the winter, care being taken to keep them rather 

 dry — a rule which should alwaj's be observed in wintering Carnations. The cutting 

 should be prepared by first giving a good drainage of any sherds of a porous nature, then 



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