CONTENTS. m 



Page. 



Papers on potash and other salines, Gale 518 



Production of available potash from natural silicates, Cushman and Coggeshall . 518 



Decomposition of feldspar and its use in fixation of atmospheric nitrogen, Ross. . 518 



Potash, silica, and alumina from feldspar. Hart 518 



Zeolitic properties of ground phonolite and lime trass fertilizer, Bussmarn .... 518 



The leacldng of potash from freshly cut kelp, Merz and Lindemuth 519 



The production of phospliate rock in 1912, Phalen 519 



Phosphate mining industry of Algeria, Mason 519 



On tlie value of Tunis phosphate for peat soils, von Feilitzen 519 



A possible commercial utilization of nelsonite, Waggaman 519 



Report on phosphatic fertilization, 1905-1910, Kristensen and Christensen 519 



Utilization of natural phosphates and silicious lime as fertilizers, Pfeiffer 520 



Analyses of agricultural lin:ie sold in Maryland, McDonnell et al 520 



Note on the influence of tlie lime-magnesia ratio upon plant growth, Loew. ... 520 



On the influence of the lime-magnesia, ratio, Gile and Ageton 520 



Pot culture experiments, 1910-11-12, Voelcker 520 



Effect of sulphites, thiosulphate, and sulphur on growth of plants, Thalau 521 



[Fertilizer inspection in Alabama], Ross 521 



Fertilizer analyses, ilcDonnell et al 522 



Analyses of fertilizers, spring season, 1913, Ealgore et al 522 



[Fertilizer inspection in Ohio] 522 



AGRICULTURAL BOTANY. 



Studies in Trifolium, Kennedy 522 



Botanical and agronomic studies on Typha, Geze 522 



PoDination and cross-fertilization in the common rice plant. Hector 522 



The weight of the seed planted and characteristics of tlie plant, I, Harris 522 



Weeds in relation to soils — Norfolk, Brenchley 523 



Effect of some Puget Sound bog v/aters on the root hairs of Tradescantia, Rigg. . 523 



Relation of environmental conditions to permanent wilting in plants, Caldwell . 523 



Transpiration and retention of water vapor by plants, Leclerc du Sablon 524 



Tlie ascent and descent of water in trees, Ewart 524 



Tlie evaporation of water and the vegetable matter elaborated by maize, Maz^. . 525 



Influence of oil reserves and tem.perature on respiration coefficient, Ivanov 525 



The anaerobic respiration of different seed plants, Kostytschew 525 



The pentosans in the germination of seed, Bernardini and Galluccio 525 



Catalytic action of liglit in germination, Lehmann and Ottenwalder 525 



Influence of illumination on formation and germinability of seeds. Combes 526 



Energy assimilated by plants cultivated under different illuminations. Rose .. . 526 



Plant cultures in colored light, Welten 526 



Branch movements induced by changes of temperature, Grossenbacher 526 



Reversibility of the physiological processes in the ripening of seeds, Ivanov. 526 



A physiological and cliemical study of after-ripening, Eckerson 527 



Cellulose as a source of energy for nitrogen fixation, McBeth 527 



The fermentation of cellulose, Kellerman and McBeth 528 



The question of cellulose fermentation, Omeliansky 528 



The use of congo red in culture media, Kellerman 528 



The physiological functions of calcium, Loew 528 



Action of manganese dioxid and other compounds on germination, Varvaro 528 



Effect of certain chlorids on tlie activity of malt diastase, Hawkins 528 



Self-poisoning in cultures of Penicillium from nitrogen feeding, Wehmer 528 



Copper treatments and lutrification in the soil, Patvu-el 529 



The effects of poisons at different concentrations upon seeds, Arcichovskij 529 



Toxicity of smoke, Knight and Crocker 529 



Injuries to plants by coal tar vapors from the Plania works at Ratibor, Ewert .. . 530 



FIELD CROPS. 



[Field crop experiments], Clark 530 



[Field experiments], Wilson 530 



Sure feed crops. Fields 530 



Experiments on permanent grass land, 1912, Kinch and Stapledon 530 



Manm-ing experiments on grass for hay, Kinch, Turner, and Stapledon 530 



Maniuial experiments on meadows. Hotter et al 530 



Influence of height of ground water table on yield of grass and hay, Pitsch ...... 531 



