216 New and Cheap Method of making Garden Walls. 



the lower part. A coping might be made of slate slabs (Fig. 68), or 

 it might be made of concrete. I should prefer it in concrete with 



FIG. 69. 



flat iron bars running across to strengthen it, as shown in Fig. 69. 

 I would undertake to build a wall of this kind for four shillings per 

 yard super, if materials are convenient to be had." 



It may be stated, in order to prevent misapprehension, that Mr. 

 Tall makes no claim of novelty in using concrete for walls. There 

 are in existence ancient churches made of this material, as well as 

 buildings of recent date; but the difficulty of construction, with 

 boards for moulding the walls, has hitherto been the great bar to its 

 use. The novelty introduced by Mr. Tall is the moulding appa- 

 ratus, which at the same time serves for the scaffold, and greatly 

 cheapens the process of erection ; and it is for this that the patent 

 is taken out. It will be better to insert the irons and eyes for the 

 support of the galvanised wires while the successive layers of the 

 wall are being built up or while the material is soft. 



