CONTENTS. Ill 



WATER - son.s. 



Page. 



Purification of drinking water by electrical methods, L. Gerard 855 



Water resources of the Philadelphia district, Florence Bascom 855 



Quality of water in Susquehanna River. drainage basin, M. < >. Leighton 855 



Amounts of nitrogen and chlorin in rain water at Rothamsted, N. II. .1. Miller. 856 



Amounts of nitrogen and chlorin in the drainage, N. II. J. Miller 856 



Relation of water content of soil to requirements of plants, ('. von Seelhorsl 



ami Fresenius 856 



Si >i Is, E. Ramann 857 



Judging^ the more important physical properties of soils, J. Hazard 857 



The available plant food in soils, II. [ngle 857 



The analysis of the soil by means of the plant, A. D. Hall 858 



Determining the fertilizer requirements of soils by plant analysis, .1. Hana- 



mann '. ' 858 



Soil inoculation '. 858 



Nutrition of micro-organisms. The bacterial population of the soil, L. Gran- 



deau 858 



Nitrogen-collecting bacteria, fallow, and exhaustive culture, T. Pfeiffer 858 



Treatment of soils with ether, carbon bisulphid, etc., F. Nobbe and L. Richter. 858 



Syllabus of illustrated lecture on acid soils, II. J. Wheeler 859 



Humus acids of gray sand (Bleisand) and brown sandstone (Ortstein), A. 



Mayer 859 



Investigations on black soils of Legienen Estate, E. Blanck 859 



Second annual report of the Reclamation Service, F. II. Newell 859 



The soil and the .ideological hist< »ry i »f Morocco, S. Meunier 859 



FERTILIZERS. 



Exact methods of conducting field experiments with fertilizers, P. Wagner 



et al 859 



Cooperative experiments with mineral fertilizers on clover, 0. Gorbatovski .. 860 



Defecation residue as a fertilizer. Field experiments, G. S. Likhovitzer 860 



Fertilizer experiments with sulphate of ammonia, H. Bachmann 860 



Culture experiments with " N" fertilizer in the year 190-J, F. von Lepel 860 



Use of calcium cyanamid and calcium nitrate as fertilizers, K. Perotti 861 



Nitrogen and agriculture in the seventeenth century, L. Thiry 861 



Chilean nitrate deposits 861 



Experiments on potash fertilization of cultivated plants, P. Wagner et al 861 



Fertilizer experiments with iron slag, II. von Feilitzen 861 



Can mud ( hleke) replace slaked lime on soils low in lime? H. von Feilitzen. 861 



Commercial fertilizers, < r. Roberts 861 



Analyses of fertilizers, C. A. Goessmann 861 



Inspection and analyses of commercial fertilizers, W. F. Hand et al 861 



Analyses of commercial fertilizers 862 



Mines and quarries, 1902 862 



FIELD CHOI'S. 



Arid farming in Utah, J. A. Widtsoe and L. A. Merrill 862 



Report of field work done at the college station for 1903, W. R. Perkins 862 



Range investigations in Arizona, I >. Griffiths 863 



Report of assistant in agrostology, E. E. Nelson 864 



Grasses and forage plants, H. Benton 864 



Miscellaneous Held crops in New South Wales, G. L. Sutton and (1. M. 



McKeown 864 



Work in cereal I needing, T. von Weinzierl , 864 



Early and modern methods of breeding cereals, J. Holmboe 864 



System of farming at Aas Agricultural College, Norway, 1860-1902, T. Land- 

 mark 864 



Effect of copper sulphate and iron sulphate solutions on plants, Sachser 865 



Alfalfa, W. K. Perkins 865 



Lucern and trefoil, D. Finlayson and J. S. Remington 865 



The testing of corn for seed, A. N. II nine 865 



Experiments with cotton, corn, and oats in 1904, .1. F. Duggar and J. M. 



Richeson ... 865. 



Tests of varieties of cotton in 1904, J . F. Duggar 866 



Cotton culture, R. J. Redding 866 



