Principles of Gardening physiologically considered. 157 



h byre ; c, stable ; d, stairs to loft ; e, larder over main cellar ; 

 f, coal-house ; g, shed ; k, wash-house ; i, potato-house ; j, coal- 

 house ; Jc, hen-house ; /, piggery. 



The villas in the neighbourhood of Perth display all sorts of 

 styles, and many of them no style at all. Had your Suburban 

 Gardener appeared twenty years sooner, and been read by the 

 proprietors of these finely situated villas, a decided improve- 

 ment must have been evident, both in the houses and in the 

 grounds adjoining them. Since the publication of that work I 

 have been continually pressing the subject of improvement on 

 the attention of the owners. 



Annat Cottage, Dec. 9. 1837. 



Art. IV. The Principles of Gardening physiologically considered. 

 By G. Regel, Gardener in the Royal Botanic Garden at Berlin. 



(Translated from the Garten Zeitung, May 2. 1840.) 



(Continued from our preceding Volume, p. 70.) 



I. On the Propagation op Plants — continued. 



1. MEANS OF PRESERVING THE CUTTINGS TILL THEY TAKE ROOT. 



As the crude sap in the cutting is not raised by endosmose 

 but by the process of evaporation, care must be taken that 

 the surface of the cut does not become dry before being put in 

 the earth, and air get into the lower end of the vessels ; for, as 

 soon as this takes place, only very strong shoots are capable .of 

 drawing up moisture, as has been proved by the experiments of 

 various philosophers. The cuttings should therefore be stuck 

 in wet sand, if they cannot immediately be put where they are 

 intended to remain, although it were better to avoid this. If, 

 however, they are such as ought to lie a day or two, in order to 

 insure success, as some banksias, acacias, &c, it ought to be 

 in a damp place ; and the precaution must be taken, if possible, 

 to cut them again before planting. If cuttings of Dryandra, 

 some banksias (B. integrifolia, B. Bauerz, B. media, B. Caleyz, 

 &c), and most of the long-leaved acacias {A. longissima, A. pen- 

 dula, A. brevifolia, A. glaucescens, A. longifolia, A. micracantha, 

 &c), be stuck in the earth immediately after being taken from 

 the parent plant, the inner bark will become black in from four- 

 teen days to four weeks, and the cutting will perish. 



This phenomenon appears to be in close connexion with 

 the form of the leaves of these plants, as those of the acacias 

 have very small stomata, while those of the dryandras have 

 none at all. In their stead, on the under side of the leaves 



