CONTENTS. in 



Page. 



Thomas slag, its preparation and use, Wagner 27 



Analyses of Thomas slag from different sources, von Feilitzen and Lugner 27 



Kelp and other sources of potash, Cameron 27 



Lime, Hite 27 



On the influc ace of the ratio of lime to magnesia on plants, Loew 27 



Is silica an inQ-'=!pensable constituent of plant food? Lundie 27 



Commercial fertilizers, Burd 28 



AGRICULTURAL BOTANY. 



On the chemical organization of the cell, Ruhland 28 



Significance of character of electrical charge for passage of colloids. Kuhland . . 28 



Fermentation of some cyclic series compounds and formation f)f humus, Perrier. 28 



Necessity of bacterial association for Chondromyccs crocatus, Pinoy 28 



A mud suckino device for obtaining soil microflora and microfauna, Perfyl'ev. . 28 



Studies in Indian to])accos. — III, Inheritance in Nicotiana tabacum, Howard.. . 29 



Flowering of Geranium robertianum under various physical conditions. Stager. . 29 



Relation between tuberization and infestation by endophytic fungi, Bean 29 



Influence of radioactivity on vegetation, \'acher 29 



Some recent studies on germination, Lehmann 30 



Germination of potato, Cou\Teur 30 



Transpiration and osmotic pressure in mangroves, von Faber 30 



The distribution of temperature in living plants, Dupont 30 



Wind and the plant world; a study, Kroll 30 



Presence and persistence of hydrocyanic acid in grains in hot regions, Raybaud . 30 



Demonstration and localization of nitrates and nitrites in plants, Klein 30 



Assimilation of nitric acid and deposit of manganese in plants, Houtermans. . . 30 



Significance of deposits in plants in *>iutions of manganese salts, Acqua 31 



Deposits in plant tissues duo to culture in manganese nitrate solution, Boselli. . 31 



Influence of nitrates on toxicity toward fungus spores, Hawkins 31 



The action of sodinm sulphate as affecting growth of plants, Haselhoff 31 



Atmospheric impurities near an industrial city, Crowther and Steuart 32 



Influence of tar, particularly tarred streets, on vegetation, Claussen 32 



FIELD CROPS. 



Study of farm practice versus field experiments, Spillman 32 



Determination of probal)le error in field experiments, Hamoth 32 



Determinations of probable errors in field experiments, Alexandrowitsch 83 



Determination of probable errors in field experiments, Hamoth 33 



Methods of testing varieties, Kostecki 33 



Variety tests of field crops, Lemmermann et al 33 



Electroculture, Escard 33 



Observations on some new methods of growing cereals, Remy and Kreplin 33 



Dominant and recessive characters in barley and oat hybrids, Thatcher 33 



[Fertilizer experiments], de Jong 34 



Cooperative irrigation experiments at Davis, Cal., 1909-1912, Beckett 34 



The reseeding of depleted grazing lands to cultivated forage plants, Sampson. . . 35 



A note on two textile plants from the Belgian Kongo, Mestdagh 35 



Alfalfa seed production, Blinn 35 



Alfalfa management in Iowa, Hughes 36 



Experiments with Turkestan alfalfa in Hungary, Grarfas 36 



A new two-rowed winter barlej', Neumann -.■•-•. ^^ 



A mutation in a pure line ot Hordeum distichum, Kiessling 36 



Variation studies in brome grass, Keyser 36 



On the presence of hydrocyanic acid in wliite clover, Mirande 36 



Silver King. — A corn for northern Iowa, Hughes 37 



Com culture in North Carolina, Burgess 37 



Notes on com growing in Guam, Thompson - - 37 



Twelfth report of Indiana Com Growers' Association, edited by Christie 37 



Fourtli annual report of the Ontario Com Growers' Association, Duff 37 



Rubelzui cotton: A new species of Gossypium from Guatemala, Lewton 37 



The cotton of the Hopi Indians: A new species of Gossypium, Lewton 37 



Experiments on the retting of flax, Ringelmann 37 



Potassium fertilizer for hops, Neumann 37 



Seed varieties of Lupinus angustifolius and L. luteua, Kajanus 38 



