GROUND-WOOD PULP. 55 
. Noble fir. 13. California lodgepole pine. 
1 
2. White spruce. 14. White pine. 
3. Amabilis fir. 15. Western yellow pine. 
4, Engelmann spruce. 16. Tamarack. 
5. Western hemlock. 17. Jack pine. 
6. Sitka spruce. 18. Loblolly pine. 
7. Balsam fir. 19. Hemlock. 
8. Lowland fir. 20. Larch. 
9. Red fir. 21. Aspen. 
10. Montana lodgepole pine. 22. Black gum. 
11. White fir. 23) Biren: 
12. Alpine fir. 
COMMERCIAL MANUFACTURE OF PAPER. 
To secure reliable data on the operation of the pulps on the paper 
machine approximately 5,000 pounds of bone-dry pulp were manu- 
- factured from each kind of wood. At the start 5 tons of pulp were 
made, but it was found later that the smaller amount would be 
sufficient for the purpose of the test. The papers were made at the 
mills of the Rhinelander Paper Co., Rhinelander, Wis., and the 
Nekoosa-Edwards Paper Co., Port Edwards, Wis. The woods and 
mixtures of woods used were as follows: 
Jack pine, green. 7. California lodgepole pine. 
Jack pine, seasoned. 8. Red fir. 
Hemlock. 9. One-half spruce and one-half hem- 
One-third spruce, two-thirds hem- lock. 
lock. 10. One-half balsam fir and _ one-half 
One-third spruce, one-third hemlock, spruce. 
and one-third jack pine. 11. Tamarack. 
Two-thirds hemlock, one-third jack | 12. One-half tamarack and _ one-half 
pine. spruce. 
1. Spruce. 13. Noble fir. 
2. Western hemlock. 14. Alpine fir. 
3. Sitka spruce. 15. White spruce. 
4. Montana lodgepole pine. 16. Engelmann spruce (Colorado). 
5. Western yellow pine. 17. Amabilis fir. 
6. Balsam fir. 
As the former group of tests has been previously reported upon 
(Forest Service Bulletin, ‘‘ Experiments with Jack Pine and Hemlock 
for Mechanical Pulp’’), only the last 17 papers manufactured at the 
Nekoosa-Edwards Paper Co. will be considered. 
Table 57 gives the results of the commercial runs. Samples of the 
printed and unprinted sheets accompany this bulletin. 
For the first 12 runs the same furnish of ground wood and sulphite 
to the beater was used in each case, the pulp consisting of quick-cook 
hemlock sulphite 25 per cent and experimental ground wood 75 per 
cent. In the last five tests the pulp was made up of 20 per cent of 
