1916] CONTENTS. HI 



AGRICULTURAL BOTANY. 



Page. 



Annual periodicity in plants, Lakon 632 



Rhythmic alternation of growth and rest in plants, Lakon 632 



Energy transformations during the germination of wheat grains, Doyer 632 



The influence of frost and light on the germination of seeds, Kinzel 632 



Germination as related to illumination, Lehmann 632 



Mutual influence of phototropic and geotropic reactions in plants, Bremekamp . . 032 



Determination of cell sap concentration, Bouyoucos and McCool 633 



The transpiration coeflicieuts of cultivated plants, Tulaikov (ToulaikoS) 633 



Assimilation of carbon dioxid i y plants, Raikow 633 



Importance of glycogen and starch as intermediate products. Waterman 633 



The characters of radish cultivated in the presence of sugar, MolUard 633 



Relation 1 'etween amylase and sugar content in resting potato tubers, Bodnar. . 634 



Zymase and carboxylase in potato and sugar 1 eet, Bodndr 634 



Oxidation of alcohol > )y seedlings, Zaleski 634 



Protein transformations in yeast, II, Zaleski and Schataloff 634 



The influence of nitrates on the development of root tubercles, Ewart 634 



Influence of manganese on the growth and ash composition of potato, Sajfert. . 634 



The occurrence of hematoid iron compounds in plants, I, II, Gola 634 



Chcndriosomes in fungi and algae, Guilliermond 635 



Division in mitochondria and relations with secretion, Moreau 635 



The formation of crystalloids of mucorin in mitochondria, Moreau 635 



Internal uredinia, Adams 635 



Asexual hy' )ridization, Daniel 635 



Variation in Cosvios Mpinnatus, Longo 635 



Seashore thicket formation i>y Prunus spmosa, Devaux 635 



Differences in resistance of plants to injiu-ious influences, Stranak 636 



The effects of illuminating gas on plante, Sorauer 636 



The influence of sulphur dioxid on plants, Trnka 636 



Secretion 1 ry roots of sul stances toxic to plants, Molliard 636 



Injurious effects from ivy growing on trees, von Tuljeuf 636 



FIELD CROPS. 



Field crops, Prianishnikoff 636 



[Irrigation experiments at Bromberg] 636 



Ten years of variety tests at Dickopshof , Richardson 637 



Root systems of pasture plants on moor soils at Flahult and Torestorp, Osvald. . 639 



Several methods of laying down cultivated land to meadow, Rhodin 639 



Com culture in the Southeastern States, Kyle 639 



Ck)tton, Sender 639 



Observations on the Idossoming of hemp, Havas 640 



Sorghum vulgare and S. halepense, Dudgeon 640 



Sudan grass, Schmitz 640 



Variation and correlation of weight and sugar content of ijeets, Otken 640 



Sugar content and chemical characters in the mother beet, Andrhk and Urban. . 641 



Tol acco, Semler 641 



Tobacco from Cyprus 642 



Frost and wheat, Cockayne 642 



Second annual seed la^ oratory report, 1914-15, Oswald 642 



Weeds and their identification, Atkinson 642 



HORTICULTURE. 



Plant propagation, Kains 642 



Plant propagation in the Tropics, Wester 642 



[Ornamental and economic plants in the Botanic Gardens], Bancroft 643 



Work of the Ganeshkhind Botanical Garden (Poona District) for 1914-15, Burns. 643 



In a college garden, Wolseley 643 



A second report on the university farm garden, Dacy 643 



A farmer of seventy who grows truck crops and fruit in southern Jersey, Cox. . 643 



Onions. — Experiments and culture, White 643 



Composition of tomatoes from 1 ^lighted vines, Bigelow 643 



Bordeaux mixture stains removed, Kains 644 



Report of general fruit committee, Stewart 644 



The time of blossoming of fnut trees 644 



The history of the classification of apples, Bunyard 644 



