78 JOURNAL OF FORESTRY 



The headings of the various chapters are as follows : Composition 

 of waste sulphite liquor ; effluents ; binding material ; gums, adhesives, 

 and sizing materials ; tanning materials ; alcohol ; fuel ; fodder ; fer- 

 tilizer; dye; sulphur; evaporation; miscellaneous; and general. 



"Among the processes for utilization of waste sulphite liquor only a 

 few are of immediate practical interest to Canada. The manufacture 

 of tanning materials is one of these. . . . Canada imports tan- 

 ning extracts from sulphite liquor, at a price ranging from three- 

 quarters of a cent to one cent a pound, which are used to a large 

 extent in the Canadian tanneries in the preparation of certain leather, 

 chiefly sole leather. The use of sulphite waste liquor as a road and 

 <iust binder and a binder for powdered materials such as peat would 

 seem to be of importance to Canada." The manufacture of alcohol 

 is also suggested as possible under certain conditions. , "The total pro- 

 duction of alcohol from waste sulphite would be about 3,320,000 gallons 

 of absolute alcohol, which would assist in freeing Canada from depend- 

 ence on foreign sources as well as utilize a waste product." 



The facts collected in this bulletin emphasize the importance of the 

 problem, show the wonderful range of possibilities, and disclose that 

 very few of the multitude of proposed processes have attained any 

 industrial importance. It is to be hoped that the research laboratory 

 recently established in Sweden for the purpose of investigation in this 

 field will be able to bridge some of the gaps between theoretical possi- 

 bilities and commercial practicalities! 



S. J. R. 



