CONTENTS. m 



Page. 



Cyanamid, dicyanamid, and lime nitrogen, De Ruijter de Wildtand Berkhout 127 



The Serpek process for the maniifacture of aluminum nitrid, Richards 127 



Bicalcic phosphate from electrolytically produced acid and alkali, Pahiiaer. ..'. 128 



Tbe phosphate deposits of continental North America, Brovra 128 



Potash from seaweed in Mexico 128 



[Production of potash salts and other fertilizers in Germany in 1912] 128 



How lime is distributed through and lost from soils, Broughton ],] 128 



The role of the infinitely small in agriculture, Bertrand ] . ] 29 



Fertilizing value of certain industrial wastes * . " 129 



The waste liquors from the sulphite-cellulose industry and their use, Stutzer. . 129 



New mineral fertilizer, Woods 129 



AGRICULTURAL BOTANY. 



The effects of artificial shading on plant growth in Louisiana, Shantz 130 



The effects of ultraviolet rays on vegetation, Stoklasa et al '.'.'.'.. 130 



Preliminary note on coagulation of proteins by ultraviolet light, Bovie. ..'.... 130 



Temperature coefficient of coagulation caused by ultra\-iolet^light, Bovie. .'.'. .. ]3l 



Forcing plants with radium, Molisch ' _' " ' 131 



The influence of thorium X on sprouting plants, Kahn "']" 131 



Recovery from hail wounds on woody plants, Voges 131 



Toxicity of smoke, Knight and Crocker '..'..'.. 131 



A delicate test seedling, Crocker, Knight, and Rose ' ' " " 132 



Formaldehyde in the sap of green plants, Angelico and Catalano V.'. ". '. '. 132 



Conditions affecting the development of lycopin in the tomato, Duggar. . .'.'.'.* ] 132 



Formation of tannase in Aspergillus niger and Penicillium sp., Knudson ! ] '. 132 



Microchemical study of hydrocyanic acid in Prunus laurocerasus, Peche. . . .. . 133 



The assimilation of free nitrogen by Azolla, Oes ' "/. I33 



Synthesis of amids through ammonia absorbed through roots, Prianichnijkov .' .' .' 133 



Obseiyations on a fungus living on fatty hydrocarbons, Gola ' ' ' 133 



Relation of bacteria, yeasts, and mold fungi to iodin, Kossowicz and Loew..." ' 133 



Studies of osmotic pressure, Brannon ' ' " 133 



Osmotic pressure and sodium chlorid content of leaves of nonhalophytes, Lewis .' 134 



Distribution of osmotic pressure in relation to water conduction, Hannig '. 134 



Protoplasmic contractions caused by distilled water, Osterhout '....... 134 



A chemical and physiological study of after-ripening of the Rosacese', Eckersoii . 134 



The relation of ventilation to the respiration of fruits, Hill, jr I35 



The transpiration of barley with and without awns, Schulze 135 



The heat of absorption of water in wood, Dunlap '..',.. ] 35 



Studies of the wild oat, Atwood '..'.'.'.'.' 135 



The problem of the origin of (Enothera lamardciana, Davis '..'.'... 135 



The variability of Bacillus solanacearum, Honing '..'.'.'. 136 



Constant variants of Capsella, Hus " 13g 



Preliminary note on inheritance of self -sterility in Reseda o'dorata, Compt'on" ... 136 



Root characters, ground water, and species distribution, Cannon ." .' 136 



FIELD CROPS. 



Second annual report of Paulding County experiment farm, Mclntire 137 



The work of Uie Truckee-Carson experiment farm in 1912, Headley .'.'. . 137 



Duty of water, True '.'.'.'.' 138 



[Irrigation experiments and sugar-beet investigations]. True et al '.'.'. ..... 138 



Report of substation of Swedish Seed Association at LuleS,, 1911, Ulander. ..... 138 



Field crop trials in Tromsoe County, Larsen \\'\ 133 



Cooperative experiments, Clifton " ] ' i3g 



Report on the Cawnpore Agricultural Station for 1912, Burt 138 



Practical crop rotation, with special reference to catch crops, Eggers " ] ' 139 



The book of grasses, Francis ] _ ' _ 139 



Report of breeding experiments with grasses and legumes, 1911, Witfe . ....... 139 



An irrigation experiment, Fischer ] ] " 139 



A simple demonstration of the action of natural selection, Harris 139 



Berseem, or Egj-ptian clover ( Trifolium alexandrinum) \a\) 



A manual of clover culture, Pyre 140 



The management of clover in com belt rotation, Drake l40 



Factors affecting the production of long-staple cotton. Cook V. ". 140 



Egyptian cotton cultiu-e in the Southwest, Scofield ] ' 140 



