AND CONSERTATORr. 39 



board hung by common joints, to cover them when not re- 

 quired open, may have a string and pulley attached for lilting, 

 and its own weight will keep it down, c, raised platform of 

 earth covered with slates, bedded in mortar to set plants upon. 

 D, posts or columns to support purling (i), on which brackets 

 are fixed to lay a shelf upon, e, path, p, stage. G, nine- 

 inch earthen pipes, fitting well into each other, and the joints 

 well secured, inside and out, with mortar, leading from fur- 

 nace (o) to chimney (l), for the purpose of keeping out frost. 

 H, stoke-hole sunk three feet, and covered with wood covers. 

 The scale applies to the ground plan, to show its measure- 

 ments. 



LEAX-TO WITH DOrBLE-EOAEDED BACE WALL. 



Another serviceable lean-to is represented in the two figures 

 that follow. This was designed to fill up a space at the end of 

 a garden where tliere stood for a back wall a thin boarded 

 fence. To strengthen this another wall was built of old floor 

 boards, "tongued" together with hoop-iron, and placed two 

 inches distant from the original wall, with a few stout upright 

 posts to keep all firm. The space between the two walls was 

 filled in with sawdust, and the result was a wall of a most sub- 

 stantial character. A very low roof, with ventilators opening 

 at top, was adapted with brickwork front and sides, and 

 wooden ventilators the whole length of the front. As an ex- 

 cavation in clay was made for this house, a bank of the original 

 clay was left 'in front, and on this mounds were made for 

 melons in summer, and — the house facing due south — fine 



