the flue area should be further increased as 

 indicated by drawings. A flue which is too 

 large in relation to the firebox, tends to create 

 a sluggish fire. In determining the size of flue 

 for camp stoves other than for specific ones 

 illustrated in this bulletin, use these illustrations 

 as a guide. 



In the multiple-unit type of camp stove, with 

 a single square flue, properly lined, division 

 by galvanized metal partitions into the proper 



number of smaller flues of proper sizes and 

 each serving its own firebox, is essential (pi. 

 XIII, fig. 4). This arrangement will prevent 

 cold air from being drawn in from any unused 

 firebox, thereby lessening the draft from the 

 burning fire. The metal partitions will ulti- 

 mately rust out and must be replaced. The in- 

 stallation of any damper in the chimney should 

 be in accordance with drawings shown in 

 plate XXII, figure 3. 



19 



