CIV THE ROYAL SOCIETY OF CANADA 



ments have been made to determine accurately these and their varia- 

 tion with age and position in the tree in Douglas fir, black spruce, 

 white spruce, red pine and white pine. Altogether about 12,000 

 measurements have been made. 



Sulphite Cooking Process. 



A start has been made on the investigation of the sulphite cooking 

 process, which is the most important method of converting pulpwood 

 into valuable chemical pulp; with the small scale apparatus available 

 experiments have been made to determine the factors affecting the 

 penetration of the cooking liquor and other factors will be studied 

 during the coming year. 



Besides the investigations mentioned above the laboratories 

 have made a collection of all literatures dealing with forest products 

 as it appeared during the past year and have also collected as much as 

 possible of the important literature published before the organization 

 of the institution so that there is now available fairly complete infor- 

 mation on any phase of the utilization of forest products. That this 

 is appreciated by the industries concerned is evidenced by the increas- 

 ing number of inquiries received and answered. 



Members of the staff have taken as active part in the work of 

 trade associations and technical and scientific societies which are 

 concerned with forest products and related subjects. These activities 

 have been of great value in furthering the work of the institution by 

 making its object more widely known and in securing the help of those 

 who are interested in such work as well as in broadening the views of 

 the staff by their association with workers in similar lines. 



The following articles have been published by the laboratories 

 during the past year: — 



Forestry Branch Bulletin No. 59, "Canadian Woods for Struc- 

 tural Timbers," by H. N. Lee, copies of which were distributed to 

 persons interested. 



"Testing of Pine Oil for Flotation," by J. S. Bates (published in 

 Monthly Bulletin of the Canadian Mining Institute, June, 1916). 



"The Preservative Treatment of Timber," by W. G. Mitchell 

 (published in Canada Lumberman, June 15, 1916). 



"The Fibre Structure of Canadian Woods," by H. N. Lee (pub- 

 lished in Canada Lumberman, July 15, 1916). 



"The Standing of Wood Fibres for Permanent Microscopic 

 Mounts," by H. N. Lee (published in Botanical Gazette, October, 

 1916). 



"Douglas Fir Fibre; with Special Reference to Length," by H. 



