CONTENTS. Ill 



Bacterial activity as a corrosive influence in the soil, Gaines 715 



The role of fertilizers, Chaptal 715 



Fertilizers and fertility, Cowell 715 



Formulae for preparing fertilizers, Guthrie 715 



Fertilizer and acid plants, MacKnight 716 



The action and value of stable manure, Schulze 716 



Experiments on the action of stable manure on upland moors, Bersch 716 



Sulphate of iron as a preservative for liquid manure, Hasler 716 



Artificial nitrates 717 



Woltereck ammonia process against Frank-Caro gas process, Zwingenberger . . . 717 



The reduction of atmospheric nitrogen 717 



The occurrence of ammonia in deep waters containing iron and manganese, Noll. 717 



Tests wi th four nitrogenous manures 717 



Action of lime nitrogen, nitrate of soda, and sulphate of ammonia, Vanha et al. . 717 



Calcium nitrate or sodium nitrate, Wagner 717 



Calcium nitrate, calcium cyanamid, nitrate of soda, and kainit, Saillard 717 



Manuring the potato crop 718 



The action of phonolite as a potash fertilizer, Tacke 718 



The value of the new silicate of potash fertilizer, Remy 718 



On the occurrence of potash salts in foreign countries, Erdmann 718 



New potash discoveries, Albert 718 



On what kinds of soil can Thomas slag be replaced by other phosj^hates? Tacke . 718 



The possibility of finding phosphate deposits in Australia, Jensen 718 



A reconnaissance of the gypsum deposits of California, Hess 718 



The use of manganese and uranium as fertilizers, Ray and Pradier 718 



Commercial value of some waste j)roducts, Guthrie 718 



Tobacco stalks and ash, Guthrie 719 



Hummock soil as a fertilizer, Mayer 719 



The question of household garbage, Burelle 719 



The whale factory, Koch , 719 



Peat fertilizer filler 719 



The lo-s of potash in the burning of molasses, Pellet 719 



Analyses of fertilizers, Curry 719 



[The fertilizer market] 719 



AGRICULTURAL BOTANY. 



Vegetation and frost, Blackman 720 



Chemical investigations on germination, Deleano 720 



Light germination, Kinzel 720 



Effect of chemical agents on transpiration and growth of wheat seedlings, Reed . 721 



Influence of fermented sugar solutions on wheat germs, Kostytschev 721 



Origin and physiological function of pentosans in plants, Ravenna and Cereser. . 721 



Are amins assimilable by higher plants? MoUiard 721 



Function of hydrocyanic acid in Sorghum vulgare, Ravenna and Zamorani .... 722 



Remarks on the immunity of plants, Bernard. 722 



The death of oak seedlings due to mycorrhiza, Nadson 722 



The spread of the pine mistletoe in Tyrol, von Tubeuf 722 



Agricultural bacteriology, Russell and Hastings .^ 723 



A method of bacteria counting, Fischer 723 



Media for the quantitative estimation of soil bacteria, Lipman and Brown 723 



Soil bacteriological investigations, Barthel 723 



On the occurrence of nitrobacteria in the sea, Thomsen 723 



Thermophilous bacteria in the Tropics, De Kruijff 723 



Some remarks on aerobic nitrogen-fixing bacteria in the Tropics, De Kruijff . . . 724 



Formation and utilization of nitrous oxid by bacteria, Beijerinck and Minkman. 724 



Two new methods for growing Azotobacter, Hoffman and Hammer 724 



Ammonia and nitrate as a nitrogen source for molds, Ritter 724 



A nitrogen fixing yeast ( Torula wiesneri), Zikes 725 



Significance of the root tubercles of Leguminosae, Vuillemin 725 



Growing clover with nonleguminous plants by sowing mixed seed, Tacke 725 



FIELD CROPS. 



Improvement of pastures in eastern New York and New England, Cotton — . 725 



Food grasses of southwest Africa, Pilger 725 



Results of cooperative tests, 1909, Wiancko and Cromer 725 



