14-0 MAINE AGRICULTURAL EXPERIMENT STATION. 



VILLE, G. — Absorption de l'azote de l'air par les plantes. 

 Compt. rend. 38: 705, 723, 1859. 



VINES, S. H. — On the relation between the formation of 

 tubercles on the roots of Leguminosae and the presence of nitro- 

 gen in the soil. Ann. Bot. II, 386, 1888-9. 



VUILLEMIN. — Les tubercles radicaux des Legumineuses. 

 Ann. d. Sci. Agr. Franc et Etrang. 1888, p. 96. 



WAGNER, P. — Can white mustard assimilate atmospheric 

 nitrogen? 1st es wahr, das der weisse Senf den freien Stick- 

 stoff der atmospharischen Luft aufnimmt und nach Art der 

 Leguminosen Stickstoff bereicherndwirkt? Deut. landw. 

 Presse, 20: 901, 1893. 



WAGNER, P. — Concerning the nitrogen question (Einige 

 zeit und streitfragen aus dem Gebiet der Dungunglehre). 

 Deut. landw. Presse 20: 913, 933, 943, 1037. 1893. 



WARD, H. MARSHALL.— On the tubercular swellings on 

 the roots of Vicia Faba. Phil. Trans. Roy. Soc. 178: 139-562. 

 1887. 



WARD, H. M. — Recent investigations and ideas on the fixa- 

 tion of nitrogen by plants. Nature, 49: 511, 1894. 



WARINGTON, R. — Organisms in soil assimilating nitrogen 

 from the atmosphere. Agl. Students' Gaz. 1895, 105. 



WILFARTH, H. — New experiments with plants collecting 

 nitrogen and their employment in agricultural practice. Deut. 

 landw. Rundschau, 1892, Nos. 8, 9, 10 and 11. Abstract, Chem. 

 Centralb. 1: 990. 1893; abstract (short) Ex. Sta. Record V, 



"3- 



Y\ ILSON, W. — Investigations of the root tubercles on leg- 

 uminous plants. Ag. Sci. 8: 437, 1894. Abstract, Ex. Sta. 

 Record VI, 616. 



WINOGRADSKY, S. — On the assimilation of the gaseous 

 nitrogen of the atmosphere by microbes. (Sur 1' assimilation de 

 1' azote gazeux de 1' atmosphere par les microbes.) Compt. 

 rend. 118: 353, 1894. Abstract, Ex. Sta. Record V, 1010. 



WINOGRADSKY, S. — Assimilation of free atmospheric 



nitrogen by microbes. Arch. Sci. Biol. 1895,297-352. Abstract, 



Jour. Chem. Soc. 1895, 283; also abstract (short)Ex. Sta. Record 



VII, 465. 



WOODS, C. D. — The acquisition of atmospheric nitrogen 



by growing plants. An. Rep. Storrs Ex. Sta. 1891. Abstract, 



Ex. Sta. Record IV, 14. 



