CONTENTS. Ill 



Page. 



Contribution to the knowledge of denitrification processes, Kiihl 121 



The construction of manure pits and tlie preservation of manure, Cornelius. . . 121 



Plans for the construction of manure pits, Friz 1 22 



Demonstration experiments with fertilizers in Carinthia, Svoboda 122 



Experiments with fertilizers on sandy soils in bad cultivation, Clausen ] 22 



Influence of fertilizers on the compositi( tn of wheat, Snyder 122 



On nitrogenous fertilizers and their application, Lavenir 122 



Nitrate-! as soil renovators, Schreiner and Reed 122 



Nitrogen capacity of soils with fertilization with nitrate of soda, Pfeiffer 122 



Lime nitrogen and nitrogen lime, II, Lohnis and Sabaschnikoff 123 



Investigations on lime nitrogen and nitrogen lime, Lohnis and Sabaschnikoff. 123 



Experiments with new nitrogenous fertilizers, Malpeaux 124 



Experiments with calcium cyanamid. Hall 124 



Nitrolime, Ragondet 124 



Effect of addition of sodium to deficient amounts of potassium, Hartwell et al. 124 



The partial substitution of potassium by sodium as a plant food, Hartwell et al. 125 

 Wliat is the relation of the increase in yield of barley produced by phosphatic 



fertilizers to the phosphoric acid content of the soil ? Pijz 1 25 



Phosphorus and humus in relation to Illinois soils, Hopkins 125 



On the behavior of minerals in soils, Vinassa de Regny 125 



Effect of lime and gypsum on the solubility of potassium, Morse and Curry. . . 125 



Effect of lime upon availability of soil constituents, Guthrie and Cohen 125 



Experiments with limeand crushed limestone on Pennsylvaniaclay loam, Frear. 126 

 Relation between effects of liming, and of nutrient solutions containing differ- 

 ent amounts of acid, upon growth of certain cereals, Hartwell and Pember. . 126 

 Relation between acid in nutrient solutions and liming, Hartwell and Pember. 127 



Analysis of a bample of synthetic calcium nitrate, Passerini 127 



Tennessee white phosphate 127 



Composition of ashes from Vesuvius, Comanducci 127 



Kainit, Jubartre 127 



Garbage tankage, McMurtrie 127 



Analyses of fertilizers for consumers, Burd 127 



Analyses of commercial fertilizers, Scovell, Curtis, and Roberts 127 



Analyses of commercial fertilizers, Frear 1 28 



Licensed commercial fertilizers, 190.S, Woll and Olson 128 



AGRICULTURAL BOTANY. 



The origin of the potato, Druery 128 



Texas honey plants, Sanborn and SchoU 128 



Poisonous properties of beans of Phaseolus luuatas, Dunstand and Henry 128 



A quantitative study of transpiration, Clapp 129 



Relation between size of the stomata and photosynthesis in grasses, Kolkunov. 129 



The physiological function of potash in ])lants, Stoklasa 130 



The influence of light and of copper on fermentation, Purvis and Wilks 130 



On the variation of peroxidase in seeds, Brocq-Rousseu and Gain 130 



Studies on variegation and some accompanying phenomena, Lindemuth 131 



Recent investigations in plant breeding, Fruwirth 131 



Reports of the plant culture stations in Denmark, 1905-6 and 1906-7 131 



FIELD CROPS. 



Thirty years of crop rotations on the prairie soil of Illinois, Hopkins et al 131 



Field crops [at Copper Center Station in 1907], Heideman 131 



[Field crops at Rampart Station in 1907], Rader 132 



Report of the Upi)er Peninsula Substation for 1905 and 1906, Geismar 132 



Forage crops in northwest Texas, Conner 133 



Grains and forage crops for northern Wisconsin, Moore and Delwiche 134 



Wyoming forage plants and their chemit'al comjwsition. Knight et al 134 



Alfalfa studies, Blinn 134 



Clover seed in the Connecticut market, Jenkins and .Tagger 135 



[Experiments in clover and corn selection]. Card - 135 



Egyptian cotton in the southwestern United States, Kearney and Peterson. . . 135 



How to Biake cotton growing pay. Carver 136 



Rice investigations: Report of first year's experiments, Krauss - 136 



Topography of the sugars and nonsugars in the sugar-beet root, Urban 141 



