100 NEW BRUNSWICK FORESTRY CONVENTION 



and thoroughly washed, being at the same time drawn through the very fine 

 meshes of the screens, which determine its fineness or quality. From the 

 screen room the pulp now finds its way to the press room, from which it 

 emerges in sheets of dry pulp about 3-64 of an inch thick, and in. this form 

 it is baled for export. 



SULPHITE FIBRE 



If we now take a portion of the finished pulp and examine it under the 

 microscope, it will be possible to compare it with the mechanical pulp and 

 determine the particular result of the chemical process, as also to ascertain 

 the relative value of the two methods. The photograph before us shows the 

 fibre in its original form, and it is quite obvious that each cell of the original 

 wood has been completely separated from its neighborsi in such a way as to 

 involve the least injury. Each cell is, in fact, seen to be complete, and it 

 therefore appears as a relatively long fibre with a correspondingly greater 

 value than mechanical pulp. The separation of the cells has been effected 

 by a series of well - known chemical changes whereby the sulphurous 

 acid has dissolved the substance forming the middle layer of the cell- 

 wall. 



MANILLA PAPER 



Sulphite pulp is employed in connection with the various other fibres in 

 the manufacture of paper, or it may be brought into combination with me- 

 chanical pulp alone. As an example of this use, tbe- fibre obtained from a 

 sample of heavy Manilla wrapping paper is shown in the photograph. It is 

 seen to consist of sulphite pulp, which may be very readily distinguished, 

 together with a certain proportion of mechanical pulp and fibres of other- 

 kinds. 



In the production of these two kinds of pulp, about 75,000 cords of 

 spruce are consumed annually, and the product amounts fo 120 tons of 

 mechanical, and 60 tons of sulphite pulp daily. Not all of this product is. 

 sent directly into the market, however. A certain proportion is utilized in 

 the manufacture of material required on the premises, while a far larger por- 

 tion is directly converted into cardboard for the manufacture of boxes to th& 

 extent of 30 tons per day, and into newspaper to the extent of 70 tons per 

 day. For the production of the latter a mixed pulp is used, and this requires 



