II CONTENTS. 



METEOROLOGY WATER. 



Page. 



Meterological elements of the United States and the solar radiation, Bigelow.. 513 



The moon and the weather, Jochimsen 513 



Further notes on the dilf erence of temperature between Mt. Royal and McGill 



Observatory, McLeod and Barnes 513 



Indications of approaching frost, Strachan 514 



A two years' study of spring frosts at Williamstown, Mass., Milham 514 



Monthly Weather Review 514 



Meteorological observations at Massachusetts Station, Ostrander and Lindblad . . 515 



[Meterological observations at North Dakota Station], Ladd 515 



Report of the director of the [Philippine] Weather Bureau for 1905, Algue. . 515 



Evaporation from water surface, Ladd 515 



Rain and run-off near San Francisco, California, Grunsky et al 515 



Fluctuations in level of the ground water and in the flow of springs, Mezger. . . 515 



Removal of iron from potable waters in Germany and Netherlands, Schwers. 515 



Sterilization of drinking water by chemical agents, Labbe 515 



Sewage and waste waters of industries, Razous 515 



Role of septic tank in biological purification of sewage, Calmette and Rolants. . 516 



Broad irrigation and intensive biological purification of sewage, Bezault 516 



The agricultural utilization of sewage, Bechmann et al 516 



[Sewage irrigation at Pasadena], Wright 516 



Importance of the agricultural utilization of sewage to industry, Wulsch 516 



SOILS — FERTILIZERS . 



Soils : Their nature and management, McConnell 5l6 



Transported soils with reference to Roman Campagna, De Angelis d'Ossat. 516 



Study of Belgian soils 516 



Nature of the soils of Morocco 517 



Report of Adzhibay Experiment Field for 1904 to 1906, Shushak 517 



On the rate of some phenomena of weathering, Zemyatchenskil 51 7 



Some laboratory experiments on the capillarity of soils, Tulaykov 517 



Effect of carbon bisulphid on soils and plants, Egorov 518 



Investigations on nitrification, Coleman 518 



Nitrification in field experiments, Frankfurt and Duschechkin 519 



The effect of carbonates upon nitrification, Owen 519 



Present knowledge of micro-organisms which fix free nitrogen, Palmans 520 



Utilization of the nitrogen of the air by plants, Jamieson 520 



Nitrogen fixation for nonleguminous plants, Bottomley 520 



Do roots assimilate nitrates? Slezkin 521 



Note on a toxic substance excreted by the roots of plants, Fletcher 521 



An alleged excretion of toxic substances by plant roots 521 



The productiveness of the soil: Biological factors, Massart 521 



Further soil tests in paraffined wire baskets, Hartwell and Pember 521 



Notes on humus and the best means of supplying it, Guthrie 522 



Technique of fertilizers, Diimont 522 



Analyses of commercial fertilizers, Hartwell et al 522 



Fertilizer experiments 522 



On the nitrification of certain nitrogenous fertilizers, De Grazia 522 



The physiological action and fertilizing value of salts of dicyandiamid, Perotti. 522 



Properties of ?alcium cyanamid in relation to water, aii-, and bacteria, Grandeau. 523 



Recent work on calcium cyanamid and its fertilizing value, Grandeau 523 



Transformation of the nitrogen of calcium cyanamid in soils, Grandeau 523 



Gaseous products of decomposition of lime nitrogen and growth, Haselhoff... 523 



Experiments with lime nitrogen on grain and sugar beets. Von Liebenberg ... 523 



Experiments with nitrate of lime in comparison with nitrate of soda, De Limay . 523 



Cold, the checking of growth, and the use of nitrates, Grandeau 523 



The manufacture of nitrates, Bazin 523 



Atmospheric nitrogen as a future commercial source of plant food. Van Slyke. . 523 



Feldspathic rock as a source of potassium, Hartwell and Pember 524 



Investigations on the formation of oceanic salt deposits, Van't Hoff 524 



Natural factors involved in solution of tricalcium phosphate in soil, Perotti 524 



Tests of the use of gypsum as a fertilizer, Dusserre 524 



Mineral resources of the United States, calendar year 1906, Day et al 525 



The future of the guano industry and the guano-producing birds of Peru, Coker. 525 



