640 



EXPERIMENT STATION EECOED 



Zinc— Continued, 

 determination in — 

 gelatin, (40) 712. 

 treated wood, (33) 208. 

 water, (39) 205. 

 effect on — 



Aspergillus niger, (28) 226, 824. 

 Aspergillus spp., (29) 825. 

 nitrogen-flxing bacteria, (38) 428. 

 fertilizing value, (27) 500; (28) 34. 

 fluorid as pole preservative, (27) 148. 

 in glass containers as source of error in water 



culture experiments, (32) 128. 

 oxid, effect on germination of seeds, (29) 528. 

 oxid, pharmaceutical, lead in, (40) 413. 

 pipe, use in water supplies, (31) 189. 

 pipes for carrying water, (33) 188. 

 poisoning, notes, (28) 677. 

 role in growth of fungi, (29) 28. 

 salts^ 



action on plants, (39) 630. 



as wood preservatives, (32) 841. 



effect on ammonification and nitrification 



in soils, (31) 120. 

 effect on disea.se susceptibility in cereals, 



(29) 844. 

 effect on wheat, (29) 520; (31) 218. 

 silicofluorid as wood preservative, (30) 646. 

 sulphate, effect on — 



ammonification, (28) 724. 

 olives, (26) 825. 



plant growth, (30) 130; (31) 325. 

 sulphate, fertilizing value, (30) 627; (40) 440. - 

 toxic effect on plants, (38) 628. 

 vessels in culture experiments, effect of, (33) 623. 

 white, effect on linseed oil, (28) 714. 

 yellow, effect on linseed oil, (28) 714. 

 Zinckenia fascialis, notes, (26) 250. 

 Zingiberone — 



corrected name for, (39) 412. 

 isolation and chemical constitution, (37) 612. 

 Zinnias, cut, preservation, (31) 837. 

 Zinyamunga, composition, (28) 873. 

 "Zipangu," analyses, (31) 759. 

 Zirconia, distribution in loam soils, (31) 618. 

 Zirconium in soils, (31) 720. 

 Zizania, cultivation by Indians, (38) 34. 

 Zizera labradus, injurious to alfalfa, (26) 655. 

 Zizyphus mucronatus, analyses and digestibility, 



(32) 167. 

 Zodiacal light, (30) 713. 

 Zodiacal light— 



and counterglow, photography of, (35) 618. 

 Birkeland's theory, (31) 615. 

 nature, (34) 117. 

 notes, (32) 25, 614. 

 Zodion, synopsis, (36) 255. 

 Zonocerus elegans, notes, (29) 853. 

 Zonocerus elegans, remedies, (30) 54. 

 Zonotrichia albicollis, coccidiosis in, (26) 187. 

 Zoocecidia— 



of Cassel and adjacent districts, catalogue, (26) 



65. 

 of northeastern United States and eastern Can- 

 ada, (39) 868. 

 of Switzerland, catalogue, (31) 656. 

 Zoocecids of North Africa, (27) 564; (28) 357. 

 Zoogeographical elements of continental regions, 



(31) 452. 

 Zoological—] 



congress, international, proceedings, (27) 655. 

 index of genera and subgenera, (29) 157. 

 philosophy, treatise, (33) 552. 

 Zoologists, vertebrate, role in national efficiency, 

 (38) 555. 



zoology- 

 agricultural, textbook, (30) 248, 



bibliography, (26) 753; (28) 247; (31) 56; (33) 

 450; (36) 151. 



Canadian, bibliography, (26) 59; (27) 551; (30) 

 52; (31) 648; (34) 651; (38) 256. 



contributions to human welfare, (38) 663. 



dictionary, (26) 652. 



economic- 

 fall manual, (27) 756. 

 textbook, (33) 652. 

 treatise, (30) 52; (38) 456. 



experimental, treatise, (26) 163. 



International Congress, (33) 450. 



medical and veterinary, index-catalogue, (26) 

 753; (28) 248. 



review of literature, (27) 368; (28) 247. 



studies, (31) 277. 



textbook, (26) 652. 



vertebrate, subspecific intergradation in, (40) 

 254. 



yearbook, (34) 494. 

 Zootechny — 



instruction in, (28) 597. 



treatise, (26) 873; (30) 170, 174. 

 Zophodia— 



convolutella, notes, (33) 652. 



grossulariae, see Gooseberry fruit worm. 

 Zorotypus hubbardi n.sp., notes, (40) 260. 

 Zostera marina — 



analyses, (37) 814. 



culture for wild ducks, (33) 251. 

 Zoysia pungens, notes, (26) 362. 

 Zuider Zee- 

 draining, (40) 487. 



reclamation, (32) 481. 

 Zukalia — 



n.spp., descriptions, (36) 245. 



nantoensis n.sp., notes, (39) 753. 



theae n.sp., description, (38) 648. 

 Zygadenin— 



isolation from death camas, (28) 197. 



notes, (28) 506; (30) 412. 

 Zygadenus— 



chemical studies, (33) 177. 



description, (32) 474. 



intermedius— 



analyses, (26) 503; (30) 412. 

 crystalline alkaloid of, (28) 506. 

 examination, (27) 881. 

 toxicity, (39) 184. 



monograph, (33) 177. 



venenosus, description, (39) 386. 



venenosus, notes, (32) 778. 

 Zygaena ampelophaga, notes, (40) 648. 

 Zygophyllum— 



afline microcarpum, analyses and digestibility. 

 (27) 871; (32) 167. 



tobago, analyses, (33) 466. 

 Zygoptera of Illinois, (39) 763. 

 Zygorhynchus — 



moelleri, occurrence in Michigan, (27) 223. 



vuilleminii, ammonia production by, (36) 221. 



vuilleminii, ammonifying power, (32) 29. 

 Z ygosaccharomyces— 



priorianus, symbiosis by, (29) 714. 



spp. in wine, (30) 711. 

 Zygosporium paraense n.sp., notes, (37) 253. 

 Zygotaxis, notes, (30) 328. 

 Zymase— 



formation in plants, (39) 733. 



in potatoes and sugar beets, (35) 634. 



in yeast, (26) 309. 



increasing and inhibiting activity of, (28) 504. 

 Zymases as affected by toluol, (28) 803. 

 Zymin, enzyms of, (30) 504. 



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