EXPLANATION OF PLATES. 



c c First flues. e e Third flues. 



d d Second flues. f f Fourth flues. 



%* One fire ought not to be allowed to work more than 

 about thirty feet in length, because by the time it has made 

 four returns, (viz. 120 feet) its heat is generally nearly 

 spent. As the heat decreases proportionable to the dis- 

 tance from the fire-place, the diminishing of the dimen- 

 sions of the flues is obvious. On this account, some per- 

 sons who give designs for building of hot-walls, recom- 

 mend a brick on edge instead of a brick in breadth for the 

 front of the two uppermost flues. When this expedient is 

 intended, it will be proper to have narrow bricks of the 

 thickness of common bricks, made on purpose to suit the 

 work. — But if the wall is intended to be drawn with stucco, 

 this last precaution will not be necessary. 



Plate III. Six different stages of Vines trained against a 

 wall, p. 117. 



IV. Extensive Vine at Northallerton, Yorkshire, 

 p. 186. 



V. Section of a hill for the growth of Vines in 

 England, p. 204. 



0- These Jive plates to be placed after p. 232, 



TREATISE ON THE PINE- APPLE. 



Plate 



I. Section of a Fruiting-house, p. 275. 

 It. A Lime-kiln, p. 292. 



III. A Steaming-stove, p. 296. 



IV. Three Species of Pine Insects, p. 310. 



V. A plan of a Pine-Stove, &c. see plate at p. 232. 

 VI. A plan of an improved Pine and Grape-stove. 



Cf* These six plates to be placed at the end of the 

 Volume. 



