102 



GARDEN WALLS. 



under ground, from one division to 

 another ; and the space for plants b b. 

 The elevation will be perceived to con- 

 sist of plain pillars, crowned by the 

 chimneys connected with the flue, and 

 by simple vases over the intermediate 

 pillars. The space between the pillars 

 supporting the chimneys stands much 

 more forward than the rest, and is faced 

 by a trellis. The receding parts can be 

 covered at pleasure with a glazed light 

 or lights, which, when not wanted, can 

 be made to slide on rails behind the 

 projecting portions. The rail at the 

 back of the screen wall is shown on a 

 larger scale, at c ; and the bottom of the 

 sliding light, with its revolving roller, 

 is exhibited at d. A side view of the 

 roller inserted at the base of the sash- 

 frame is given at e. A review of the 

 chief features of the plan will leave the 

 following general ideas : The wall is 

 composed of alternate prominent and 

 retiring compartments. Each of the 

 former includes two stone pillars, which 

 stand out a little beyond all the re- 

 mainder, and are to be left uncovered ; 

 while between them is a division, over 

 which is extended a trellis for supporting 

 the hardier kinds of climbers, and those 

 that demand no protection. The recesses 

 are capable of being covered in cold 

 weather with glazed sashes, which can be 

 placed out of sight in a moment, when- 

 ever it is safe to remove them, by sliding 

 them behind the other divisions. In 

 these recesses the tenderest greenhouse 

 plants may be cultivated and trained 

 against a trellis, which could not be 



shown in the figure. Thus are combined 

 a handsome architectural elevation, and 

 the means of having some of the finest 

 exotic plants exposed in summer, without 

 danger, and in a condition incomparably 



Fig. 107. m T fc^y 



and attractive 

 than they ever 

 attain in the 

 greenhouse." 



A conserva- 

 tive wall, hav- 

 ing no archi- 

 tectural pre- 

 tensions, may 

 be constructed 

 upon the prin- 

 ciple of the an- 

 nexed figures. 

 The section, 

 fig. 107, shows 

 a hollow brick 

 wall which may 

 be heated by 

 hot- water pipes 

 placed near the bottom, or placed as 

 shown in figure, having a portable pro- 

 jecting coping 18 inches in breadth. 

 This coping is supported upon iron 

 brackets, the upper part of which pass 

 through the wall, and is turned down 

 behind, or fastened with a broad-headed 

 nut and screw, for greater strength. 

 These brackets are fixtures. The wooden 

 coping is 'fixed to the brackets by thumb- 

 screws, and is let into a shallow groove 

 under the stone or other permanent 

 coping, unless in cases where the coping 

 projects more than 2 inches, in which 



Fig. 108. 



cases the groove would be unnecessary. 

 In front of the wall are placed, at the 

 distance of 6 feet apart, stone or cast-iron 

 pillars b, on figs. 107 and 109, rising 18 

 inches above the surface of the ground. 

 Upon these are laid cast-iron rails, fig. 108, 

 the whole length of the wall, and 8 inches 

 broad, having two beads cast on their 

 upper side, quite parallel to each other. 

 The space between the surface of the 

 ground and the bottom of the rails is to 

 be filled in with boarding, as seen in the 



elevation, fig. 109, a a, it being consider- 

 ed expedient to keep the glass sashes 

 quite clear of the ground, that they 

 may not be injured by damp. Corre- 

 sponding iron rails, but lighter in con- 

 struction, are attached to the points of 

 the brackets at the top of the wall; 

 hence the extra strength required in 

 these brackets over those in ordinary 

 use. These rails above and below being 

 fixed in their places, the whole is then 

 ready to receive the glass sashes, which 



