CONTENTS. Ill 



Page. 



Observations and researches on soil temperature, 11, De Grazia 20 



Nitriticatiou and denitrification in soils, \'on Bazarewski 20 



The occurrence and the formation of nitric acid in humusand moorsoils, Weis. 21 



Nitrification in Transvaal soils. Watt 21 



Nitrogen fi x iny: 1 )acteria, IV, Lohnis and Westermann 21 



On ammoniacal fermentation, Kffront 21 



Fixation of atmospliei-ic nitro<;en 21 



Nitrogen and its value, Kiihn et al 22 



Concerning the existence of nonnitrifying soils, Stevens and Withers 22 



The clecompotHtion of nitrates by bacteria, Severin 22 



Soil fatigue caused by organic compounds, Schreiner and Sullivan 22 



Barnvard manure: Its treatment and application to the soil, Thorne 22 



Batg'uano, Hare 22 



(jreen manuring, De (irazia 22 



Experiments with certain fertilizer salts, De Grazia 23 



Tiie diffusion of fertilizer salts in the soil, Miintz and Gaudechon 23 



The diffusion of fertilizer salts in the soil, Krische 23 



Box experiments with fertilizers, Clausen 23 



Experiments with commercial fertilizers on the Peterhof farm. Von Knieriem. 23 



Denitrification in cultivated soils, Ampola 24 



The physiological character of ammonium salts, Prianischnikov 24 



Toxic properties of cyan compounds and their decomposition products, Stritt. . 24 



Tolerance of wheat toward calcium cyanamid, De Grazia 24 



The industrial utilization of atmospheric nitrogen, Bernthsen 24 



The nitrate industry in Norway, Eyde 24 



Nitrate and its substitntes, Jurisch 24 



The value of potash silicate, ground phonolith, Bromme 25 



Influence of phosphatic fertilizer on the seeds of corn, Parrozzani 25 



Raw phosphates and green manure, De Grazia 25 



The phosphate land question. 25 



Mining and milling Florida phosphates, Stone 25 



Lime and liming, \'an Slyke 25 



Action of calcium fluorid in leucitic soils, Ampola 25 



Horse-hoof parings 26 



Analyses of fertilizers sold in Maryland, McDonnell et al 26 



Inspection and analyses of commercial fertilizers, Hand et al 26 



Analyses of fertilizers, Morse and Curry 26 



Analyses of commercial fertilizers, Hartwell, Morgan, and Whipple 26 



Analyses of commercial fertilizers, Thompson 26 



Fertilizers, Crawley 26 



The mineral industry: Its statistics during 1907, edited by Ingalls 27 



AGRICULTURAL BOTANY. 



Department of botanical research, MacDougal 27 



Report of the botanist. Nelson 27 



Seeds and plants imported from July 1 to Sei)tember 30, 1908. Inventory N(j. Iti. 27 



Vegetation affected by agriculture in Central America, Cook 27 



Studies in Trifolium, I, Kennedy 27 



Notes on some wild forms and species of tuber-bearing Solanums, Sutton 27 



Breeding strains oi plants, Davenport 28 



The superiority of line breeding over narrow breeding. Cook 28 



A new case of i)arthenocarpus development, P^wert 29 



Some aspects of the mycorrhiza problem, ( iruenberg 29 



The value of certain nutritive elements to the plant cell. Reed 29 



Influence of varying ratio of calcium and magnesium, Bernardiniand Corso.. 30 



Tlie amounts of calcium and magnesium in plant seeds, Schulze and Godet. . . 30 



The calcium and magnesium content of certain seed, Willstiitter 30 



The stimulating effect of phosphoric acid on the growth of plants, Kiihl 30 



The chlorin content of leaves of plants, Vandevelde 30 



The occurrence of betain in plants. Urban 30 



The nutritive effect of amids on the seed, embryo, and plant, Lefevre 30 



Peptolytic ferments in seeds, Abderhalden and Dammhann 31 



The study of winter buds with reference to growth and leaf content, Moore. 31 



The effect of the removal of showy parts of flowers, McCray 31 



Influence of graft on some annual and perennial plants, Daniel 31 



