354 JOURNAL OF FORESTRY 



time that ''spruce turpentine" or spruce resin consists largely of cymene 

 and contains only traces of terpenes, it is only recently that research in 

 this field has been active. A small plant for the production of toluol 

 from "spruce turpentine" has been established in Philadelphia, but the 

 paper manufacturers — possibly because of the profits attendant to the 

 manufacture of paper at the present time — seem unwilling to go to the 

 trouble to collect and ship the turpentine. It would seem to the re- 

 viewer that this difficulty might be overcome by locating such plants at 

 or near the larger sulphite mills. 



B. L. G. 



Spruce Turpentine. Journal of Industrial and Engineering Chemistry, Janu- 

 ary I, 1918, p. 4. 



A comparatively recent development in Pacific 

 Motor- Coast logging is the increasing use of motor- 



truck trucks. Too little attention is often given to the 



Roads character of the road over which the truck must 



operate, simply because such machines will stand 

 up under abuse. The best woods road is the so-called "pole road," con- 

 structed of poles, with occasional ties, to form a track for the motor- 

 truck. Puncheon, ties (cull), or plank laid crossways are condemned 

 as unsatisfactory and expensive roads for trucks. The cost of con- 

 struction of pole roads in Washington varies from $1,500 to $1,900 per 

 mile, exclusive of grading. 



B. L. G. 



West Coast Lumberman, XXXIII, Februarj- i, 1918, p. 34. 



Recent experiments have demonstrated that 

 Waste waste sulphite liquor, when evaporated to dry- 



Liquor ncss, is available for the generation of steam 



for power, such fuel yielding 6,000 B. T. U.'s per 



Fuel pound. A pulp mill of 50 tons daily capacity 



must dispose of 500 tons of spent liquor, 10 per 

 cent of which will yield organic materials available for fuel. The use 

 of this material has been made possible through the adaption of pow- 

 dered coal burning inethods. The chief difficulty to overcome in the 

 utilization of waste liquor in this manner seems to lie in the expense of 

 evaporating such a bulk of material to dryness. 



B. L. G. 



Burning Fuel from Waste Liquors. Pulp and Paper Magazine of Canada, 

 January 24, igi8, p. 70. 



