CONTENTS. m 



Page. 



The formation of humic bodies from organic substances, Bottomley 515 



Amino-acid nitrogen of soil and the amino acids, Potter and Snyder 515 



Transformation of vegetable compounds into humus, Trusov 516 



Effect of remo\-ing the soluble humus from a soil on its productiveness, Weir. . 516 



The loss of nitrogen and organic matter in cultivated Kansas soils, Swanson. . . 516 



The soil : The principles of maintaining soil fertility, Miller 516 



How every plantation manager ought to analyze his soils, Leplae 516 



The relation of fertilizers to "soil fertility, Guthrie 617 



Influence of different fertilizers on the growth of important crops, JNIausberg. . 517 



Tests relative to mixing fertilizers with seed, Bretignifere and Cartier 517 



The composition, storage, and application of farmyard manure 517 



Experiments with liquid manure, Vogel 517 



The action of different air-nitrogen fertilizers, Hiltner and Lang 518 



Experiments vnth. different phosphatic fertilizers, Lende-Njaa 518 



The influence of phosphatic fertilizers on root development, Watt 518 



Experiments with steamed bone meal, Gyarfas 519 



Rock phosphate in New Zealand: Its value to the Dominion, Aston 519 



Potash, Keitt and King _ 519 



Fertilizer experiments with common salt and potash salts, Bolin 519 



The maintenance of soil fertility. — Liming the corn crop, Thome 520 



The cost of agricultural lime, Montgomery 520 



The value of activated sludge as a fertilizer, Bartow and Hatfield 520 



Activated sludge experiments at Urbana, Illinois ._ 520 



The value of filter press cake as a fertilizer. Cross and Belile 520 



Report on commercial fertilizers, 1915, Jenkins and Street 520 



Commercial fertilizers, Curtis et al 521 



The fertilizer inspection for 1915, Curry and Smith ._ 521 



Report on analyses of samples of commercial fertilizers dining 1915 521 



Analyses of commercial fertilizers, Brackett et al 521 



AGRICULTURAL BOTANY. 



The water relation between plant and soil, Livingston and Hawkins 521 



Hourly transpiration rate on clear days, Briggs and Shantz 522 



Notes on plant chemistry, Keegan 522 



Carbohydi-ate transformations in sweet potatoes, Hasselbiing and Hawkins. . . . 522 



Respiration in higher plants, Neger 523 



Relation of catalase and ojddases to respiration in plants, Appleman 523 



The role of oxidases in respiration. Reed 524 



The distribution of invertase in beets at different stages, Colin 524 



Studies on phototropism, Arisz 624 



The final hydrogen ion concentrations of cultures of Bacillus colt, Clark 524 



Chondriosomes of epidermal cells of flowers of Iris gennanica, Guilliermond . . 524 



Electric charge of protoplasm and other substances in living cells, McClendon. 525 



The function of chlorophyll, Maze 525 



Pollen formation, Guignard 525 



A new cyanogeniferous genus of the papilionaceous legumes, Gard 525 



The acid secretion of the gram plant, Cicer arietinum, Sahasrabuddhe 525 



The physiological action of the salts of aluminum upon plants, Kratzmann 525 



The influence of some organic poisons on plant cells, Weevers 526 



Smelter fumes injury to vegetation, Weldon 526 



Sexual reproduction, its nature, origin, and consequences, Dangeard 526 



The phenomena of sexuality in the Uredinese, Moreau 526 



The chromosome xie^v of heridity and its meaning to plant breeders, East. . . . 527 



Inventory of seeds and plants imported from July 1 to September 30, 1913. . . . 527 



FIELD CROPS. 



The influence of planting distance on the yield of crops, Chittenden 527 



Reclamation of swamp land, Deem 527 



Irrigated agriculture in the San Luis Valley, Cone and Kezer 527 



Breeding millet and sorgo for drought adaptation, Dillman 528 



Grades of hay and straw 528 



Farming, with alfalfa bacteria culture, Philo 528 



Treatment of bean seeds with a solution of iron sulphate, Vargas 528 



Corn, Bowman 529 



