A Dpxexxial Record 145 



Closely connected with this problem, and of more vital impor- 

 tance due to the growing scarcity of pulp woods, is tliat of rossing. 

 chipping, drying and baling of pulp wood preparatory to delivery to 

 the pulp mill. With the vast pulp wood forests of the West practically 

 untouched, it is felt that some such method as this may offer a solution 

 to the decreasing supply of pulp wood in the East. This is now a cost 

 of transportation problem. 



For many years the enormous amounts of the unavoidable waste 

 in the lumber industry has challenged attention. Few pulp mills, 

 however, have been in a position to utilize this waste, and have de- 

 pended upon round wood for their supply. Conservation of timber 

 resources will in time compel the utmost utilization of this waste, and 

 the time is not far distant when lumber mills will undoubtedly under- 

 take the barking of edgings and slabs, chipping and screening the 

 wood and selling, in the case of hemlock, the bark to the tanneries. 



Tlie utilization of hemlock bark obtained from the barking drums 

 has already been the subject of study upon semi-commercial scale, and 

 and it only remains to bring the tanner and pulp man to a mutual 

 imderstanding of each other's problems. The burning of such bark 

 is indeed a great waste if the value for tanning purposes as shown by 

 the semi-commercial test is actually proved in the commercial tests to 

 be made, and there now seems to be no question about its being worked 

 out satisfactorily. 



The increasing cost and scarcity of wood labor has both reduced 

 the supply and increased the value of hemlock bark. And in addition, 

 the inability of the lumbermen to deliver peeled pulp wood to the pulp 

 manufacturer has further increased the cost of this commodity. 



The woods of the national forests, particularly those of the West, 

 have been the subject of an intensive investigation looking toward 

 their utilization by both mechanical and chemical processes. All the 

 more important pulp wood species have been investigated, and samples 

 are available on practically all the woods of importance from a pulp- 

 making standpoint. Local and economic conditions still remain to be 

 studied, and since a great deal of this work was done prior to 1914, the 

 greatly changed conditions necessitate a further survey. 



Sulphite pulp can best be produced from the non-resinous woods, 

 and the decreasing supply brings into importance the possibility of 

 reducing resinous woods by this process. A successful solution of this 



