1918] 



LIST OP PUBLICATIONS. 



XI 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Contd. Page. 



Detection of Added Water in 

 Milk by Means of a Simpli- 

 fied Molecular Concentra- 

 tion Constant, L. W. Ferns. 11 



A Modification of the Price 

 Method for the Separation of 

 the Permitted Coal-tar Col- 

 ors to Include Tartrazin, 

 E. H. Ingersoll 11 



Plant Succession on Aban- 

 doned Roads in Eastern Col- 

 orado, H. L. Shantz 23 



A Method for Producing Con- 

 ductivity Water Suitable 

 for W^ater Culture Experi- 

 ments, R. B. Harvey 26 



A Correlation between Endo- 

 sperm Color and Albinism 

 in Maize, J. H. Kempton. . . 28 



Harvesting Tobacco by Prim- 

 ing or Picking the Leaves as 

 Compared with Cutting the 

 Stalks, E. G. Moss 37 



Developing Foreign Markets 

 for Apples, C. W. Moomaw.. 42 



Selecting Nut Trees for Plant- 

 ing, C. A. Reed 44 



Choosing the Best Tree Seeds, 

 C. J. Kraebel 45 



Developments in the Marking 

 of Western White Pine 

 {Pinus vionticola) in North- 

 ern Idaho, C. K. McHarg, 

 J. Kittredge, J. F. Preston, 

 etal 46 



The Kiln Drying of Lumber, 

 H. D. Tiemann 46 



Some Factors Influencing the 

 Prevalence of Endothia gy- 

 rosa, N. E. Stevens 52 



[Chestnut bark disease], H. 

 Metcalf 52 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Contd. Page. 



[Diseases of the English Wal- 

 nut], S. M. McMurran 52 



The Pack Rat as an Enemy of 

 Natural Reproduction on 

 the Ans:ele8 National Forest, 

 E. N. Munns. 53 



Goviphus parvidens, a New 

 Species of Dragon Fly from 

 Maryland, Bertha P. Currie. 56 



An Asymmetrical Bird Louse 

 Found on Three Different 

 Species of Troupials, J. H. 

 Paine 56 



Miscible Oil "i^. Fish-oil Soap 

 Sprays for the Control of 

 Florida Aleyrodids, E. A. 

 •Back and S. S. Crossman. . . 58 



Scientific Note on Beetles 

 Causing Damage to Cotton 

 in Yuma Valley, Ariz., 

 E. A. McGregor... 61 



A Second Importation of the 

 European Egg Parasite of 

 the Elm Leaf Beetle, L. O. 

 Howard 62 



A New American Parasite of 

 the Hessian Fly {Mayetiola 

 destructor), F. H. My evs 63 



The Type Species of the 

 Genera of the Cynipoidea, or 

 the Gall Wasps and Parasitic 

 Cynipoids, S. A. Rohwer 

 and Margaret M. Fagan 63 



Blowing Renovated Butter 

 Oil at Pasteurizing Temper- 

 ature, R. H. Shaw and R. P. 

 Norton 77 



School Agriculture and Com- 

 munity Service, F. E. 

 Heald 93 



