40 MISCELLANEOUS PAPERS. 



of the cioar. oreat care must be exercised to avoid the sources of error 

 iu this test which have been previous!}' discussed. The test should not 

 onl}' be repeated with a single tjq^e of tiller to avoid the effects of anj- 

 possible unevenness or other imperfections in the manufacture of the 

 cigars, but at least two different types of filler should be used, one of 

 these being heavy and the other light in the sense in which these terms 

 are used here. 



TESTING THE BURN OF CIGAR-FILLER TOBACCO. 



Testing the burn of a tiller is a much simpler problem than is the 

 case with a wrapper. The principal elements of the burn are the 

 evenness and the capacity for holding fire, and the character of the ash 

 is unimportant, except that it should be compact. The evenness of 

 the burn and the fire-holding capacit}^ are best determined by using 

 the cigar test. In the case of tiller tobacco the capacity for holding 

 fire thus refers simply to the length of time the cigar will continue to 

 burn after being lighted without being puffed by the smoker. The 

 effects of the binder and wrapper on the burn may be avoided by 

 makino- the entire cigar from the filler leaf to be tested. Another 

 decided advantage in making the whole cigar from the same tobacco 

 is that the aroma, which is so important in the filler, can also be tested 

 at the same time. In determining the fire-holding capacity it is only 

 necessary to light the cigar and test it at gradually increasing intervals 

 of time to find whether it has ceased to burn. It is, however, desir- 

 able to test the fire-holding capacity and the evenness of the burn on 

 separate cigars if sufficient material is at hand for this purpose. 



100— IV 



