1919] 



INDEX OF SUBJECTS. 



1007 



Yam — 



disease, notos, 749. 



meal, preparation, 65, 

 Yams — 



culture experiments, 825, 832. 



notes, 825. 

 Yeast — 



activity as affected by flour extraction 

 and admixture, P>(i2. 



autolyzed, in culture media, 83. 



cells, catalasc action in, 409. 



grains, dried, analyses, N.Y. State, 8G8. 



nitrogenous constituents, 802. 



nutritive value, 65, 169, 263, 465. 



polyvalent, for alcohol production, 508. 



therapeutic value, 778. 



vitamin requirement, G70. 



zinc content, 464. 

 Yeasts and Azotobacter, comparison, Tenn., 

 430. 



Yellow — 



bunting, food habits, 454. 



fever, studies, 851. 



' {See also Stegomyia.) 



mice, factors for color, 175. 



throat, nest life, studies, 753. 

 Yucca data, analyses, Ariz., 367. 

 Yucca, use in feeding, Tex., 70. 

 Zea antiqua n.sp., description, 530. 

 Zebu cattle of Morocco, tests, 368. 

 Zeuf/ophora scutellm-is in New Jersey, 549. 

 Zinc — 



arsenite, tests, Wis., 661. 



content of food products, 464. 



content of oysters, 464. 



determination, 464. 



in the human organism, 465. 

 Zinyamunga, culture in Florida, Fla., 37. 



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