Jan. 6-Mar. 31, 1919 



Index 



357 



Page 



Swanson, C. O., and Tague, E. L. (paper): 

 Determination of Acidity and Titrable 

 Nitrogen in Wheat with the Hydrogen 

 Electrode 1-13 



Swiss chard. See Beta vulgaris var. cicla. 



Tague, E. L., and Swanson, C. O. (paper): 

 Determination of Acidity and Titrable 

 Nitrogen in Wheat with the Hydrogen 



, Electrode 1-13 



Temperature, effect on — 



angular-leafspot of tobacco 226 



apple-scald 199-200 



morphology of Puccinia graminis 44-68-69 



Tenebroides sp., natural enemy of Ckrysobolh- 

 ris tranquebarica 161 



Teosinte. See Euchlaena mexicana. 



Timeromicrus maculatus — 



economic importance 173 



larva 173 



hibernation 172 



parasite of Bruchophagus futiebris 173-174 



pupa 173 



relative proportion of sexes 1 73 



Tisdale, W. H. (paper): Physoderma Disease 

 of Com 137-154 



Tobacco. See Nicoliana tabacum. 



Toxity of salts to nitrifying organisms 129-135 



Trichogramma minututn, parasite of Pegomyia 

 calyptrala 238 



TrifoUum praiense, attacked by Bruchophagus 

 funebris 165-174 



Triticum — 

 aesthum — 

 determination of acidity and titrable 



nitrogen 1-13 



effect on nitrification of acid soil 27-42 



host of Puccinia graminis 43-77 



tolerance of barium carbonate and stron- 

 tium carbonate 187-188, 190-191 



Trj/icM»t— Continued. Page 



compaclum, host of Puccinia graminis 



tritici-compacii 54-77 



dicoccum, — 



host of Puccinia gram.inis tritici-compacii. 54-77 



resistant to Puccinia graminis 103-105 



durum, resistant to Puccinia graminis. . . . 103-105 

 monococcum, resistant to Puccinia gram,inis 



103-10S 



spp . , host of Puccinia graminis 103-105 



True, Rodney H., Black, Otis F, and Kelley, 

 James W. (paper): Ash Absorption by 

 Spinachfrom Concentrated Soil Solutions. . . 15-25 



Two Species of Pegomyia Mining the Leaves 

 of Dock (paper) 229-244 



Urbahns, Theodore D. (paper): Life History 

 Observations on Four Recently Described 

 Parasites of Bruchophagus funebris 165-174 



Urediniospores of Puccinia graminis, mor- 

 phology 43-77 



Vanilla planifolia, influence of foreign pollen 

 on development of fruits 245-252 



Vanillon; effect of pollen on fruits of Vanilla 

 planifolia 245-252 



Variations and Mode of Secretion of Milk 

 Solids (paper) 79-102 



Ventilation, effect on apple-scald. . 205-206, 212-213 



Vigna sinensis, tolerance of barium carbonate 

 184-185 



Wheat. See Triticum aestivum. 



Wilkins, R. H. et al. (paper): Effect of Cer- 

 tain Grain Rations on the Growth of the 

 White Leghorn Chick 305-312 



Winter wheat. See Triticum aestivum. 



Woodpecker, red-headed. See Melanerpes 

 erythroce phalus . 



Zea mays — 



Physoderma disease 137-154 



tolerance of barium and strontium com- 

 pounds 191-193 



o 



