CONTENTS. Ill 



Page. 



Relation of pot experiments to the active phosphoric acid of the soil. Traps. . . 423 



Fertility and the phosphoric acid soluble in water, Pouget and Chouchak 423 



On the interaction of potash and lime, Niggl 423 



A method for the study of soil fertility problems, Lipman 423 



Work of the chemical laboratory, Welbel 423 



The effect of earthworms on soil productiveness, Russell 424 



The influence of stubble burning on the fertility of the soil, Ewart 424 



Changes in soils through forestation of cultivated lands, Fricke 424 



Fatigue of the soil, Rousset 424 



The story of the soil, Hopkins 424 



Fertilizer experiments, Schneidewind et al 424 



The loss of nitrogen in stable manure, Niklewski 425 



Concerning lime nitrogen and nitrogen lime, Konig 426 



Action of lime nitrogen, lime nitrate, and lime nitrite on moor soil 426 



Investigations on the action of humus-silicic acid in sandy soils, Stutzer 426 



The nitrates of Chile, De Launay 426 



Aluminum nitrogen 426 



The industrial fixation of nitrogen, Renouf 427 



A new phosphatic fertilizer, Palmaer phosphate, Maiziferes 427 



Notes on the rock phosphate deposits of South Australia, Brown 427 



The world's production of phosphates in 1909, Maizieres 427 



Pot experiments with phonolite, and notes on the action of phonolite, Hiltner. 427 



On the value of ground phonolite as a fertilizer 427 



The use of p>Titic earth in agriculture. Vera 427 



Water plants as fertilizer, Oelker 428 



Fertilizers, Rose and Heimburger 428 



Inspection and analyses of commercial fertilizers. Hand et al 428 



Analyses and valuations of commercial fertilizers, Cathcart et al 428 



Commercial fertilizers, Hills, Jones, and Benedict 428 



The inspection of cotton-seed meal. Hand et al 428 



AGRICULTURAL BOTANY. 



The conditions of parasitism in plants, MacDougal and Canon 428 



Studies on the development of bulbous plants, Andre 429 



A study of elm-tree seedlings showing Mendelian results, Henry 429 



Male sterility in potatoes, a dominant Mendelian character, Salaman 429 



On right and left handedness in barley, Compton 430 



On the nitrogen supply of soils and of plants, Heinze 430 



A contribution to the biochemistry of soils, Moll 430 



The fixation of nitrogen by free living soil bacteria, Bottomley 431 



The amid nutrition of green plants, Lefevre 431 



The production of hydrocyanic acid in Arum macidntum, Heliert and Heim. . 431 



The oil of bitter almonds in Centaur ea aspera, Gerber and Cotte 431 



Photochemical synthesis of carbohydrates, Stoklasa and Zdobuicky 431 



The utilization of xylan by Xylaria hypoxylon, Molliard and Gatin 431 



Water requirements of crops in India, Leather 432 



The type localities of plants first described from New Mexico, Standley 432 



The North American species of Panicum, Hitchcock and Chase 432 



FIELD CROPS. 



Field experiments with farm crops, Saunders et al 432 



Results in 1910 from grain, fodder corn, field roots, and potatoes, Saunders.. 435 



Main conclusions from the Poltava Experiment Field, Tretyakov 436 



Breeding drought-resisting forage plants for the Great Plains area, Dillman 436 



Alfalfa investigations, Kennedy 437 



Relation of albumin content, etc., to malting qualities of barley, Wlokka 437 



Stand and soil fertility as factors in testing varieties of corn, Mooers 437 



Breeding new tj'pes of Egyptian cotton, Kearney 438 



Correlation between diameter of potato tubers and starchiness, Renski 439 



The soy bean; history, varieties, and field studies. Piper and Morse 439 



Influence of manure on yield of winter wheat and beets, Frankfurt 440 



Mineral fertilizers under summer wheat at Poltava Field, Tretyakov 440 



Results of seed tests for 1910, Taylor 440 



