20 DEPARTMENT OF AGRICULTURE BULS. 601-625. 



Wood — Continued. 



preservation — continued. Bulletin 



tests of absorption and penetration of coal tar and creosote No - Page. 



in longleaf pine 607 2-43 



pulp- 

 production by different processes 620 2 



sulphite — 



cooking, operation, test plans, and apparatus 620 4-6 



from spruce, effect of varying cooking conditions, 



bulletin by S. E. Lunak 1 620 1-24 



process of manufacture, discovery and growth of in- 

 dustry, 1867-1916 620 2 



structure, relation to penetration by creosote 606 11-16. 17 



Wooden products, lumber used in manufacture, bulletin by J. C. 



Nellis 605 1-18 



Wood en ware, woods and quantities used 605 8-17 



Woods — 



kinds used for sulphite-process pulp, and consumption, 1900- 



1916 620 2-4 



varieties used in manufacture of wooden products 605 8-17 



Yogurt cheese, nature, note 608 61 



Yorkshire-stilton cheese, nature, note 608 15 



Yucca, quantity used in manufacture of wooden products 605 17 



Zelus renardii, enemy of citrus thrips 616 26 



Zimmer, J. T., citation on crows' food habits 621 23 



o 



