CONTENTS. Ill 



Pagre. 



Methods for arresting and utilizing moving allu\-ial mud 626 



The maintenance of soil fertility, Thorne 626 



The feeding of crops and stock, Hall 626 



Soil improvement, Van Hoek and Rauwerda 626 



The effect of straw on the nitrogen of green manures, Stormer 627 



Cooperative fertilizer experiments, Fraps 627 



Fertilizer experiments, Van Hoek and Rauwerda 628 



Fertilizer experiments, Van Deventer and Houtman 629 



New fertilizers, Hoffmann 629 



On various nitrogenous fertilizers, Ampola 629 



The utilization of nitrogen, Haber 629 



The fixation of atmospheric nitrogen, Bonnefoi 629 



Nitrification by ultraviolet rays, Berthelot and Gaudechon 629 



Commercial production of ammonia. Tufts 630 



[Production of ammonium sulphate in England] 630 



Preparation of calcium cyanamid and its uses as a manurial agent 630 



Potash from feldspar, Herstein 630 



Potash in China 631 



The use of fine groimd raw phosphate as a substitute for Thomas slag, Remy. . 631 



Analysis of phosphates, Hardy and Vandormael 631 



The pj-Tophosphates in the cultivation of sugar beets, Voglino 631 



Calcium requirements and relations of calcium and magnesium, Konovalov. .. 631 



[The lime-magnesia ratio aud chlorosis of citrus fruits], Lipman and Snowden. . 631 



The value of molasses as a fertilizer. Cross 632 



Guano deposits of Assumption Island, Seychelles, Dupont 632 



AGRICULTURAL BOTANY. 



Seasonal variation in the food reserves of trees, Preston and Phillips 632 



On the chemotropism of plant roots, Porodko 632 



Researches on the formation of nitric acid in living cells. Maze 633 



Assimilation of atmospheric nitrogen by green plants, Mameli and Pollacci. . . . 633 



On the need of lime salts in the metabolism of the fungus Coprinus, Weii- 633 



The mechanism of carbon assimilation, III, Usher and Priestley 634 



Relation of odorous constituents of certain plants to plant metabolism, Rabak . 634 



A research on the origin of alkaloids in plants, Ciamician and Ravenna 634 



On the direct guaiacum reaction given by plant extracts, WTieldale 634 



Inheritance of fasciation in Zea mays, Hus and Murdock 635 



A case of gametic coupling in Pisum, De Vilmorin and Bateson 635 



On gametic coupling and repulsion in Primula sinensis, Gregory 635 



On the microflora of soils in the vicinity of Rome, Perotti 635 



FIELD CROPS. 



Work of the Gooding substation, Farrell 635 



Results of crop experiments, NicoU 636 



Report on harvest, season 1910-11, Connor. 636 



Government experimental farms, 1910, Richardson 636 



Report of Hedemarken County Experiment Station, 1910, Christie 637 



Alfalfa in northwest Texas, Conner 637 



The improvement of the Proskowetz-Original-Pedigree barley. Von Tschermak . 637 



Red clover, Westgate and Hillman 637 



Inheritance of row-numbers in maize ears, Burtt-Davy 638 



Maize from Nyasaland and the Gambia 638 



The shrinkage of corn in storage, Duvel and Duval 638 



The problem of the improvement of cotton in Agra and Oudh, Leake and Parr. 638 



Suggestions for cotton growers, Dickson 639 



Cotton cultivation : Prospects in Transvaal, Place 639 



Cotton growing in German East Africa, Hamilton 639 



The introduction and cultivation of exotic cottons in Nyasaland, McCall 639 



Field pea production in Washington, Evans 639 



Rice, Kenny 639 



Sisal hemp in Fiji, Knowles 639 



The best two sweet sorghums for forage, Conner 639 



The Eckendori breeding standard, Schmelzer 640 



Yields of sugar canes: Crops of 1910, Harrison aud Stockdale 640 



Cultivation of tobacco in the Philippine Islands, Brewer. . , 640 



Winter wheat in western South Dakota, Salmon 640 



