CONTENTS. m 



Page. 



The so-called respiration of powdered seeds, Iwanoff 220 



Effect of warm l^aths on resting plants, Iraklionov 220 



Shortening resting period of shoots by wounding and injection of water, Weber 221 



"^llie influence of enzyms on the respiration of plants, Lvov 221 



The light requirement of plants in relation to leaf form and position, Wiesner. . 221 



The relation of light and temperature to leaf fall, Varga 221 



Studies on cessation of flowering, Wacker 221 



Opening and closure of stomata as showTi by method of infiltration, Molisch. . . 221 



A new method of estimating the aperture of stomata, Darwn and Pertz 222 



Transpiration in wet leaves, llin 222 



Transpiration and the ascent of sap, Dixon 222 



Measuring the transpiration of emersed water plants, Otis 223 



The relative -waiting coefficients for different plants, Briggs and Shantz 223 



Conditions which affect the branching of roots, Kewlon 223 



Agriciiltural microbiology, Kayser 223 



Soil fungi, Goddard 223 



The occuiTcnce of Zygorhynchus wodleri in Michigan, Grossman 223 



Formation of volatile acids after fermentation, Osterwaldcr 223 



A new fermenting fungus, Osterwalder 224 



The mycorrhiza of Solanum, Bernard 224 



Gastrodia elala and its symbiotic association with Armillaria mcllea, Kusano 224 



Tlie fungicidal action of bulbs of orchids, Bernard 224 



Effects of Roentgen rays on micro-organisms and ferments, Giinther 225 



Nitrogen-fixing bacteria in leaves of Rubiaccse, von Eaber 225 



Nitrogen fixation by fungi in relation to nitrogen nourishment, Stahel 225 



Nitrogen assimilation and a new hypothesis of protein formation, Baudisch. . . 226 



Protein synthesis in lower plants, Puriewitsch 226 



A physiological study of nitrate-reducing bacteria, Fred 226 



Potash requirement by the nitrogen bacteria, Vogel 226 



Ammonia and nitrates as a nitrogen source for mold fungi, Ritter 226 



Anaerol)ic decomposition of protein and intramolecular respiration, Godlewski . 226 



The nutrition of some epiphytic BromeUaceae, Picado 227 



On the origin of carbon assimilated by plants, Cailletet 227 



Chlorophyll in plants and colloidal chlorophyll, Herlitzka 227 



Studies on anthiocyanin, III, Grafe 228 



Investigations on the origin of alkaloids in plants, Ciamician and Ravenna. . . 228 



The tannin-colloid complexes in the fruit of the persimmon, Lloyd 228 



Influence of iron on the growth of certain molds, Sauton 228 



The extraordinary sensitiveness of Aspergillus niger to manganese, Bertrand . . . 228 



Poisonous action of oxalic acid salts and physiological action of calcium, Loew. 229 



Effects of basic compounds on seedlings and on the lower organisms, Bokorny. . 229 



Movement of minerals in autumn leaves, Ramann •. 229 



Mineral movements on freezing of leaves, Ramann 229 



Smoke, fumes, and cultivated soil 229 



Premature fall of flower petals, Fitting 230 



Bud mutations of Solanum maglia, Heckel 230 



A study of hybrids between Nicotiana bigclovii and X. quadrivalvis, East 230 



A retrogressive metamorphosis artificially produced, Alexander 230 



The influence of the seed upon the size of the fruit in Staphylea, I, Harris 231 



FIELD CROPS. 



Relation of electricity to vegetation and agricultural products, Bruttini 231 



Electroculture at Halle, Kiihn 231 



Influence of root development on the tillering power of cereals. Parr 231 



The Demtschinsky hilUng method, Demtschinsky 232 



The Demtschinsky methods for growing small gi-ains, Demtschinsky 232 



[Tests of the Demtschinsky method], Bohutignsky 232 



Tests of the methods of Demtschinsky and Zehetmayr, Lemmermann et al 232 



Tests of the Demtschinsky, ZehetmajT, and other cultural methods, Einecke.. 233 



Tests of new grain culture methods, Fniwirth 233 



[Experiments with, field crops], Auchinleck 233 



[Field crop tests in the Fiji Islands], Knowles 234 



[Variety and other tests], Hadfield 234 



[Tests of new grasses], Duncan 234 



Influence of time of cutting upon hay, Crowther and Ruston 234 



