CONTENTS. Ill 



Page. 



Evaporation in Egypt and the Sudan , Craig 817 



The water supply of Indiana 817 



Sewage sludge disposal, Ruggles 817 



SOILS — FERTILIZERS. 



WTiat the States are doing for soil fertility, Carver 818 



Recent advances in agricultural science. — The fertility of the soil. Hall 818 



Some problems in soil fertility, Severance 819 



A case of soil infertility due to bad texture and lack of lime, Hanley 819 



The permeability of an ideal soil to air and water, Green and Ampt 819 



Observations on liquids circulating in cultivated soils, Gola 819 



The movement nf water in irrigated soils, Widtsoe and McLaughlin 819 



The bio<hcniiral relation of phosphoric acid in the soil, Miiller 821 



Soil conditions and plant growth, Russell 821 



Some observations on the effect of soil aeration on plant growth, Hunter 821 



Relation of crop rotatioii to humus and associated plant food. Walker 821 



Distribution and activities of bacteria in soils of the arid region, Lipman 822 



The law of minimum, Pouget and Chouchak 823 



The black cotton soils of India. Harrison and Amaswami Sivan 823 



The soils of Webster County, Peter and Jones 823 



Protocol of the sixty-eighth session of the Central Moor Commission 824 



Report of the chemist, Gile 824 



The atmosphere as a raw material in fertilizer production 824 



Supposed loss of nitrogen in ralcium cyanamid (nitrf)lime ). Liberi 824 



Instability of the cyanamid nitrogen* in calcium cyanamid i^nitrolime), Liberi. 824 



A new artificial manure 824 



The principal catalytic fertilizers, Miege 824 



[The toleration of coffee and of cacao pkints for sodium chlorid], Kuijper 824 



The availability of the nitrogen and plio.s})horic acid in bat guanos, Gile 825 



Regarding the fertilizer value of pond mud, Kossovich 825 



Guadeloupe's use of fertilizers, Dumont 825 



Fertilizers in Russia 825 



AGRICULTURAL BOTANY. 



Influence of the concentration of dissolved substances. Pouget and Chouchak. . 826 



The influence of radio-active mineral on wheat, Ewart 826 



The action of uranium on the vegetable cell, Acqua 826 



The chemical behavior of plants in acetylene atmosphere, Grafe and Richter. . 826 



The influence of ultraviolet rays on higher plants, Kluyver 827 



The influence of light on the flowering of Japanese hops and hemp, Toumois. . 827 



The relations between oxidation ferments and respiration in plants, Schmidt. . 828 



Tannin content and starch formation in woody growths, Ren vail 828 



Conditions influencing fixation of nitrogen by Azotobacter, Mockeridge 828 



Formation and significance of the root nodules in the Podocarpinese, Spratt. . . 828 



On well-marked aerotropic growths of Bacillus megatherium, Johnson 829 



Spiraea ulmaria and its bearing on xeromorphy in marsh plants. Yapp*. 829 



Studies on the progress of plasmolysis, Hechl 829 



The part played by living cells in sap ascent, Ursprung 829 



Studies on regenerative processes in plants, Kabus 829 



Heat evolution by wounded plants, Tiessen 830 



Arsenic in some parasitic or parasitized plants, Jadin and Astmc 830 



Some quantitative determinations of manganese in plants, Jadin and Astruc. . 830 



Variations in proportion of nicotin in tobacco plant, Chuard and Mellet 830 



The influence of tobacco smoke on plants, Molisch 830 



A case of chronic poisoning of fruit trees by factory smoke, Nasini et al 831 



FIELD CROPS. 



The Wobum field experiments, 1910, Voelcker 831 



The Wobum field experiments, 1911, Voelcker 832 



Report of Hedemarken County Experiment Station, 1911, Christie 833 



[Field crops at the Roseworthy Agricultural College], Perkins and Spafford 833 



[Small grain experiments at the Roseworthy Agricultural College], Perkins 834 



[Depth of sowing tests], Perkins and Spafford 834 



