CONTENTS. ni 



AGRICULTURAL BOTANY. 



Page. 



Climatology and vegetation in Colorado, Bobbins 27 



The theory of periodic mutations, Leclerc du Sablon 27 



The transmission of characters without expression in vegetables, Tracy, sr 28 



The development of parasitic spermophytes, Heinricher 28 



The lichens of Minnesota, Fink . 28 



Annual review of mycology, Vuillemin 28 



On soil bacteriology, Dzierzbicki 28 



Determination of cellulose-fermenting ability of soil organisms, Christensen ... 29 



Investigations on the occurrence of Azotobacter in moor soils, von Feilitzen.. . 29 



On the mineral needs of Azotobacter, Kaserer 29 



The assimilation of free nitrogen by green plants, Mameli and Pollacci 29 



The infection of serradella and other cultivated plants with bacteria, Hiltner.. 29 



The duration of the vitality of seeds of Orohanche crenata, Passerini 30 



The anatomy of some tubers. Reed 30 



Experimental researches on vegetable assimilation and respiration , VI , Thoday . 30 



On the absorption of water by the seeds of Viciafaba, Home and Coull 31 



The presence of a glucosid in pear leaves, Bourquelot and Fichtenholz 31 



Starch content of leaves dropped in autumn, Harter 31 



Influence of copper and manganese sulphates on growth of barley, Brenchley. 31 



On the toxicity of certain salts toward green leaves, Maq^uenne and Demoussy. 31 



Some effects of a harmful organic soil constituent, Schreiner and Skinner 32 



Some effects of a harmful organic soil constituent, Schreiner and Skinner 32 



The influence of iron on the formation of spores of Aspergillus niger, Sauton ... 32 



Recent observations on callose, Mangin 32 



FIELD CROPS. 



The complete farmer, McConnell 33 



History and importance of electro-culture 33 



Demonstration farm reports, 1909, Pottawattamie County, Holden et al 33 



Results of experiments on Black Hawk County farm, 1909, Holden et al 33 



Demonstration farm reports, 1909, Delaware County, Holden et al 33 



Demonstration farm reports, 1909, Woodbury County, Holden et al 34 



[Experiments with field crops], Gilchrist 34 



[Experiments with farm crops], McCall and Davy 35 



On the flora of certain Cotswold pastures, Stapledon 35 



Experiments on permanent grass land, 1910, Kinch 35 



Report on grass seed mixture experiments, 1906-1909, Greig and Findlay 35 



Practical hay production, Nowacki 35 



Cereal map of Manitoba, Saskatchewan, and Alberta, 1909 35 



A new forage crop, Bertoni 36 



Composition of some forage beets 36 



Seed corn, Hartley 36 



Selecting and storing seed corn. Bull and Robbins 36 



Cotton selection on the farm by the stalks, leaves, and bolls, Cook 36 



How much nitrogen do lupines add to the soil? von P^eilitzen 36 



The potato as a truck crop, Corbett 36 



Change of seed and manurial tests, Angus 36 



Rice culture, Knapp 36 



Wild rice seed for planting 36 



Two new strains of rye, von Riimker 37 



The production of cigar-leaf tobacco in Pennsylvania, Frear and Hibshman. . . 37 



Experiments in turnip culture, Carlier 37 



The relative amounts of dry matter in Swedish turnips, Collins 37 



The development of the grain of wheat, Brenchley and Hall 37 



Correlation in wheat, Deneumostier 37 



Wheat — Variety tests, Schmitz 38 



Roumanian wheat — Harvests of 1900-1908, Zaharia 38 



HORTICULTURE. 



Frost fighting, Wollaber 38 



Frost fighting in the Boise Valley, Wells 38 



Modern ideas over the reciprocal influence of stock and scion, Bencke 38 



Report of the Geisenheim Experiment Station for 1909, Wortmann et aL. 38 



Agricultural experiments, Cousins 38 



