CONTENTS. Ill 



Page. 



Methoxyl in soil organic matter, Shorey and Lathrop 524 



Glycerids of fatty acid in soils, Schreinev and Shorey 524 



Paraffin hydrocarbons in soils, Schreiner and Shorey 524 



Toxic substances excreted by plant roots in the soil, Rordam 524 



Proportions of lime to magnesia in soil, Snowden 525 



Improving alkaline lands, Robertson 525 



Value and fertilizer requirements of Norrbotten marsh soils, Hellstrom 525 



The action of mineral fertilizers on the permeability of soils, Larue 526 



Results of field experiments to determine the fertilizer needs of soils 526 



Field and fertilizer trials by Swedish Moor Culture Association, von Feilitzen. . 526 



Fertilizer and variety tests by agricultural societies in Sweden, Bolin 526 



Storage experiments with farm manure, Hansen and Kristensen 526 



JFertilizer experiments, McWethy and Towar 526 



The nitrate industry, Ossa 526 



Norwegian nitrate, lime nitrogen, and nitrogen lime, Konig 527 



The manufacture of air nitrate, Schonherr 527 



The use of potassic fertilizers on primitive soils, Gu^pin 527 



Potash deposits in the Netherlands, Hiesink 527 



Tests of Palmaer phosphate, Grandeau 527 



Floats, Gaither 527 



Solubility of calcium phosphate, Foster and Neville 527 



Investigations on the lime requirements of soils, Christensen and Larsen 527 



Carbonate of lime 528 



Utilization of distillery vinasse, Calmette 528 



Composition and use of Henequin (sisal) pulp, Hebert and Heim 528 



Analyses and valuations of fertilizers and ground bone, Cathcart et al 528 



AGRICULTURAL BOTANY. 



A textbook of general bacteriology. Frost and McCampbell 529 



Review of agricultural bacteriology, Kayser 529 



Bacteria in fi-ozen soil. Conn 529 



Variability in Bacillus prodigiosits, Beijerinck 529 



Bacterial flora as a factor in the unproductiveness of soils, Dachnowski 529 



The decomposition of uric acid by bacteria, Liebert 530 



Mobilization of phosphoric acid in soils under bacterial activity, Sewerin 530 



Experiments with Bottomley's nitro-bacterine culture, Easterby 531 



The place in which nitrates are utilized by plants, Acqua 531 



Protein formation in ripening seeds, Schulze and Winterstein 531 



Role of endodermis in absorption of salts in the plant, De Rufz de Lavison 532 



The selective role of roots in the absorption of salts, De Rufz de Lavison 532 



Influence of artificial oxydases and metallic compounds on wheat, Nazari . . . 532 



The resistance of wheat and barley grains to poisons, Schroeder 532 



Influence of temperature on respiration of higher plants, Kuyper 533 



Studies on the influence of low temperatures on plant cells, Schaffnit 533 



Contribution to the knowledge of water secretion in plants, Burck 533 



Significance of mucilage in germination of seed, Ravenna and Zamorani 534 



Formation of hydrocyanic acid in germinating seed, Ravenna and Zamorani. . 534 



On the occurrence of the wild form of sugar beet, von Proskowetz 534 



The behavior of pure line cultures of Glomerella, Shear 534 



FIELD CROPS. 



Farm crops, Burkett 535 



[Dry farm cropping and tests of oats, wheat, and barley], M'Wethy and Towar. . 535 



Imperial Valley settlers' crop manual, Coit and Packard 535 



[Experiments with summer crops], Valder 535 



[Variety and manurial tests with cane, rice, and cotton], Harrison 535 



[Introductions of field crops]. Strong 537 



Growth of nitrogen collecting and using plants in mixed seedings, Tacke 537 



On lucerne; with notes on some otheT leguminous crops. Dyer 537 



Measurement of correlation with special reference to corn, Rietz and Smith 537 



Measurement of correlation with special reference to corn, Rietz and Smith 538 



American corn-growing methods in Russia, Grout 538 



Standard types of Rhodesian maize and their points, Mundy 538 



Chou Moellier, Pinn , 538 



The root development of cotton plants in different soils, Tempany 538 



