C. 12.] EXPLANATION OF THE PLATES. 235 



fcreened cinders mixed in equal quantities 

 make an excellent fire, and for which 

 there need be no alteration made in this 

 plan ; but for turf or wood alone, the fur- 

 nace fhould be made at leaft a third lar- 

 ger, and the grate confiderably fmaller. 



Cinders, with a finall portion of coal, 

 or charcoal of pit-coal, is certainly the 

 kind of fuel to be preferred to all others ; 

 on account that it caufes little fmoke, and 

 confequently the flues keep the longer 

 clean. It might therefore be proper, where 

 there is a considerable extent of forcing, 

 to colled or purchafe cinders, or to have 

 charcoal made on purpofe. 



Fig. 2. reprefents the Winter pruning of 

 three vine plants, and part of a fourth and 

 fifth, according to my method. (See 

 Chap. V. Setf. V.), 



Plate VI. reprefents the plan, fedions, 

 and elevation of a green-houfe on an im- 

 proved conftrudion for breeding young 

 plants, and bringing them to an early 

 flowering flate. See more on this fubjed 

 in Chap. XL Seel. I, 



SEC- 



