YIELDS FROM DISTILLATION OF CERTAIN HARDWOODS. 



13 



COMPARISON OF VALUES. 



The combined value of commercial alcohol and acetate of lime 

 from the various forms of material per cord of wood of the various 

 species is given in Table 6, which is computed from the yields given 

 in Table 4. These values are according to the prevailing prices for 

 1911-13. 1 



In judging the value of the different forms and species for dis- 

 tillation, the yields under commercial conditions must be consid- 

 ered, and therefore the value of the acetate per cord of wood of 

 different species is computed on a basis of two-thirds of the yields 

 shown. The value of the alcohol is based on the experimental 

 yields, since these are at most only slightly higher than average 

 commercial yields. Tar and gas are not included in the computa- 

 tion of the value of products, because they are relatively unimpor- 

 tant and are commonly used as fuel at the plant. Charcoal is one 

 of the valuable commercial products, but is not included because 

 there are no definite data from which the values might be computed. 

 The charcoal produced by the experimental method has not been 

 subjected to temperatures as high as in commercial practice, and 

 therefore contains more volatile matter. Although the relation be- 

 tween the yields obtained from different species in the experiments 

 might be the same as between those obtained by commercial meth- 

 ods, there is no information on the quality of the charcoal from 

 different species. Also, charcoal is usually sold by volume, and since 

 no data are available on the weight per bushel for that produced 

 from different species, the yields can not be computed to commer- 

 cial units. 



TABLE 6. Values of commercial alcohol and acetate per cord of wood of various species. 1 



1 The market price of cruae alcohol is fairly stable, but acetate of lime fluctuates considerably from 

 time to time. For this reason the relative value of the different species, from the standpoint of value of 

 products, may vary from the calculations indicated. 



2 The weights per cord are derived as explained on p. . 



3 At 26 cents per gallon for ak-ohol and $2.50 per hundredweight for aoetaie of lime. The acetate is com- 

 puted from two-thirds the yields given in Table 4. 



4 One determination onlv. 



