CONTENTS 11 



Page 

 Department Bulletin No. 1298. — Control op Decay in Pulp and 

 Pulp Wood — Continued. 



Preservation of pulp by chemical treatment 31 



Work of other investigators 32 



Experimental procedure 33 



Results of preservative treatments 36 



Preservatives recommended for mill application 48 



Summary 49 



Appendix 52 



Studies of specific fungi that deteriorate wood pulp 52 



Work of prior investigators 52 



Materials and methods employed 55 



Fungi observed 56 



Physical and chemical properties of ground-wood pulp deterio- 

 rated by specific fungi in pure cultures 67 



Physical properties 67 



Chemical properties 74 



Bibliography 79 



Department Bulletin No. 1299. — Relative Resistance of Wheat 

 to Bunt in the Pacific Coast States: 



Introduction 1 



Previous investigations 2 



Present investigations 3 



Location and scope 3 



Methods 4 



Results with American wheats 5 



Common wheats 5 



Club wheats 16 



Durum wheats 18 



Minor wheat groups 18 



Results with Australian wheats 20 



Results with Indian wheats 22 



Results with South African wheats 23 



Results with miscellaneous wheats 23 



Resistant wheat varieties 24 



Hard red winter wheats 25 



Hard red winter selections , 26 



Soft red winter wheats 26 



White wheats 26 



Summary 27 



Literature cited 29 



Department Bulletin No. 1300. — Corn and Hog Correlations: 



Sources and methods of determining the data 1 



The correlations 11 



The corn crop 13 



Acreage 21 



Yield 21 



Influence of remote causes on corn crop 22 



The December corn price 22 



Influence of corn on the hog situation 23 



The hog variables 27 



Summer weight and breeding 30 



Winter weight 37 



Price of hogs 38 



Slimmer .slaughter 40 



Winter slaughter 41 



The system of hog and corn variables as a whole 42 



The method of path coefficients 42 



Central system of relations 44 



Slaughter and live weight 48 



Pork production and total western pack 50 



Total eastern pack 50 



Farm price of hogs, January 1 51 



The correlations _« 51 



Prediction formulas ' 52 



Summary 56 



