34 THE FORCING GARDENER. [B. J, 



damper is not fhut at all, fince by the par- 

 tial contraction of the vent the current 

 will be increafed. 



In moderate weather, I have generally 

 found two fires fufficient for twenty-four 

 hours ; or rather, ftrictly fpeaking, a fire 

 and an half: viz. a full fire, according to 

 the feafon and temperature the houfe is 

 worked to, about four or five in the even- 

 ing, and half as much at nine at night. 

 In fevere weather, three fires at moft ; 

 viz. one at four in the evening, one at nine 

 or ten, and one at fix or feven in the 

 morning. But here obferve, that in this 

 cafe, the furnace-door will generally re- 

 quire to be opened quite, after the fire is 

 fairly kindled ; as the flue will be kept 

 eonftantly hot, by the flow foaking heat 

 of the furnace. And this is none of the 

 leaft of the advantages which this furnace 

 has over the other, as hereby the climate 

 of the houfe is regulated, even in the moft 

 ftormy weather, with a much greater de- 

 gree of exadnefs. 



By a fmall variation in the conftrudion 

 of this furnace, almoft any kind of fuel 

 may be ufed with fuccefs. Turf and 



fcreene4 



