CONTENTS. Ill 



Page. 



Worthless fertilizers, Burd 228 



Resume of work of the fertilizer section, Haskins 228 



Fertilizer analyses, Patten, Winter, and Clippert ' . ' ^ 228 



AGRICULTURAL BOTANY. 



Investigations on Mendelian heredity, De Vilmorin 228 



Plant breeding studies in peas, Waugh and Shaw 228 



Origin and functions of pentosans in plants, Ravenna and Montanari 228 



On the phosphorus and ash content of the leaves of perennial plants, Andre. . . 229 



The presence of free hydrocyanic acid in plants, Ravenna and Tonegutti 229 



A physiological-chemical research on the root tubercles of Viciafaba, Sani. . . . 229 



The assimilation of nitrogen by certain nitrogen-fixing bacteria, Bottomley . . . 229 



On growth stimuli, Nabokich 230 



The effects of radium rays on plants, Acqua 230 



The acid content and acid resistance of various roots, Aso 231 



The resistance of Medicago seed to high temperatures, Schneider-Orelli 231 



A consideration of the Dioscorese found in the United States, Bartlett 231 



FIELD CROPS. 



Cultivation methods and crop rotations for the Great Plains area, Chilcott 231 



Demonstration work on southern farms, Knapp 233 



Report of the agriculturist. Brooks, Fulton, and Gaskill 233 



[Experiments with field crops], Rawson et al 234 



The seeding of clovers and grasses. Miller 235 



The seeding of alfalfa, Hutchison 236 



Alfalfa in New Hampjshire, Taylor 236 



Growing broom corn in Colorado, Keyser 236 



Breeding and selection of corn, Taylor 236 



The value of first-generation hybrids in corn, Collins 236 



Corn cultivation. Hartley 236 



The seeding of cowpeas, Miller 236 



Milo, Keyser and Cottrell 237 



Oats : Growing the crop, Warburton 237 



Oats : Distribution and uses, Warburton 237 



Potato investigations, Craig 237 



Growing potatoes in Colorado, Fitch 237 



The potato: Selection of seed and cultivation, Rogers 237 



WTaeat growing in Missouri, Demaree 237 



Seed germination and separation. Stone 237 



Seed purity work, 1909, Chapman 238 



HORTICULTURE. 



Experiments in breeding sweet corn. Pearl and Surface 238 



(-'abbage culture, Stuckey 239 



A preliminary report on the vegetable growing industry in Oregon, Bouquet. . 239 



[Fertilizer experiments at the cranberry substation], Brooks 239 



Orchard green-manure crops in California, McKee 239 



Varieties of fruit originated in Michigan, Fletcher 240 



The Ben Davis group of apples, Shaw 240 



Variation in apples, Shaw 241 



Natural variation of the apple as a factor in improvement of varieties, Davis. . 241 



Manuring an apple orchard, Brooks 241 



The box pack for apples, Wicks 242 



A])ples and pears for export. Van der Merwe 242 



A biometric study of the seeds of a vinifera grape, Seyot 242 



Coffea robusta as a catch crop for Para rubber, Cramer 242 



The ornamental value of the saltbushes, Griffiths 243 



FORESTRY. 



Report of committee on breeding nut and forest trees, Sud worth 243 



Walnut-oak hybrid experiments, Babcock 243 



The commercial hickories, Boisen and Newlin 243 



