1918] 



INDEX OF SUBJECTS. 



1001 



Xanthorhoe prwfectata, life history Page, 



and remedies 257 



Xanthosomas, varieties 526 



"Xenia and other influences follow- 

 ing fertilization 526 



Xerophthalmia, relation to diet 268 



XylarUi polymorpha and X. digi- 



tata, notes 249 



XyleMops tasilare — 



notes 762 



on pecan, U.S.D.A 157 



Xyleborus fornioatus, digest of data 564 



(Xyleborus) Xylehorinus p e c ani s , 



notes 762 



Xylometer, description 46 



Yams — 



culture experiments 336 



varieties 33, 335, 526 



weevils affecting, U.S.D.A 864 



Tautias, culture 231 



Teast — 



accessory growth substance in 503 



grains, analyses. Mass 665 



grains, dried, analyses 369 



grains, dried, analyses, N.Y. 



State 67 



82481°— IS 9 



Yeast — Continued. Page. 



thermal death point, Vt 468 



wine, effects of salts on 503 



Yeasts as affected by spices 469 



Yponomeuta malincUa, identity and 



distribution 860 



Yucca, culture in Cuba 538 



Yucca elata as a silage crop, U.S.D.A. 471 



Zea tunicata and Z. ramosa, hybrids 525 



Zebra-horse hybrids, skull characters 65 

 Zebu cattle, value for tick-infested 



regions 69 



Zinc — 



arsenite, analyses. Can 643 



chlorid as a timber preservative 248 



effect on nitrogen-fixing bacteria 428 



toxic effect on plants 628 



Zizanla, cultivation by Indians 34 



Zoologists, vertebrate, rSle in na- 

 tional efficiency 555 



Zoology — 



Canadian, bibliography 256 



contributions to human welfare 663 



economic, treatise 456 



Zukalia thew n.sp., description 468 



o 



