CONTENTS. Ill 



AGRICULTURAL BOTANY. 



Page. 



A text-book of general bacteriology, Jordan 717 



A review of microbiological agriculture, Kayser 717 



On bacteriological soil investigation methods, Remy and Rosing 717 



The movements of nitrogen in the soils in the vicinity of Rome, Perotti 717 



Relation of certain fungi to nitrogen fixation, Duggar and Knudson 717 



Torula bogoriensis rubra, a new nitrogen-fixing yeast, De Kruijff 717 



Influence of mineral constituents of solutions on Azotobacter, Ki'zemieniewska. 717 



Influence of the cultm'e media on the formation of diastase by molds, Saito. . . 718 



The translocation of carbohydrates in plants, Mangham 718 



Role of reduction processes in the respiration of plants, Zaleski 718 



The relation between chlorophyll and photosynthetic energy, Lubimenko 718 



The action of light on chlorophyll, Dangeard 720 



The action of different colored light on plants, Flanunarion 720 



Experiments on the fall and renewal of leaves, Flammarion 720 



Influence of temperature ©n the phenomena of growth, Loisel 720 



The induced maturity of seeds. Maze 720 



The nature and uses of hard seeds, Rees 721 



The retention of mineral matter taken up by annual plants, Andre 721 



The increased tolerance of maize to boron, Agulhon 721 



Observations on the biology and pathology of sterility in the olive, Petri 721 



Proportions of lime to magnesia and nutrition in citrus trees, Snowden 722 



The effect of cement dust on citrus trees, Parish 722 



An effect of cement dust on orange trees, Peirce 722 



Natural vegetation as an indicator of crop production, Shantz 722 



Economic significance of natural cross-fertilization in India, Howard et al 723 



Notes on the cultivation of an edible mushroom, Matruchot 723 



Seeds and plants imported from October 1 to December 31, 1909 723 



FIELD CROPS. 



Growing crops in western Nebraska, Snyder and Burr 723 



[Alfalfa, clover, small grain, potato, and rotation tests], Waldron 725 



[Irrigation, dry farming, range conditions, and plant breeding]. Clothier et al. . 727 



[Variety and manurial tests with cereals and root crops], Foulkes et al 728 



Possible rotation crops for southern Rhodesia, Mundy 729 



From the Veliko-Polovetz Experiment Station, Skrodski 730 



Fallow culture according to data of the Poltava Experiment Field, Mankovski. . 730 



The grazing ranges of Arizona, Thornber 730 



Notes on the winter pasture plants and grasses, Mundy 731 



On the improvement of grasses and clovers at Svalof , Witte 731 



Report on grasses and clover fields, 1905-1909, Hansen and Mortensen 731 



Report of breeding experiments with grasses, 1909, Witte 731 



Variety tests during 1907, Lemmermann and Liebau 731 



Variety tests during 1908, Lemmermann and Liebau 732 



Cooperative variety tests in Sweden, 1909, Bolin 732 



Report of Ultuna substation of Swedish seed grain association, 1909, Elofson... 732 



Correlation of characters in corn, Ewing 732 



Selecting and judging corn, Hutchison 733 



Maize variety test at Skinners Court, season 1909-10, Walters 733 



Sulla clover, Budd 733 



Guide to cotton culture in the German Colonies, Zimmermann 733 



Japanese cane for forage, Scott 733 



Investigations of old Norwegian oat varieties, Christie 733 



The peanut, Beattie 734 



Fertilizing potatoes in 1909, Mazversit ■ 734 



Ptelation of spring harrowing to the stooling of winter rye, Kuznitski 734 



Report of work with rye in 1909, Ljung 734 



The importance and improvement of the grain sorghums, Ball 734 



[Sugar beet culture and the sugar industry in Uruguay], Puig y Nattino 734 



The assimilation of the chief nutritive substances by beets, Dushechkin 734 



[Relation of early and late planting of beets to premature shooting], Schubart. . 735 



Svalof Extra-squarehead II, Nilsson-Ehle 735 



Work with wheat and oats at Svalof, 1909, Nilsson-Ehle 735 



The sulphur bleaching of commercial oats and barley. Smith 735 



On measures for the encouragement of a domestic seed production, Elofson 736 



