42 Journal of Agricultural Research voi.xvi.no. 2 



(15) Koch, Alfred. 



I91O. UBER LUFTSTICKSTOFFBINDUNG IM BODEN MIT HILFE VON ZELLULOSE ALS 



ENERGiEMATERiAL. In Centbl. Bakt. [etc.], Abt. 2, Bd. 27, No. 1/3, p. 

 1-7. 



(16) Kossowicz, Alexander. 



1912. EINFUHRUNG IN DIE AGRIKULTURMYKOLOGIE. I. TEIL: BODENBAKTERIOLOGIE. 



143 p., 47 fig. Berlin. Literatur, p. 105-130. 



(17) LiPMAN, Jacob G., and Brown, Percy B. 



1909. NOTES ON METHODS AND CtTLTURE MEDIA. Ill N. J. Agr. Exp. Sta. 29tll Ann. 



Rpt. [1907] /08, p. 129-136. 



(18) LOHNIS, F. 



1910. HANDBucH der landwirtschaftuchen bakteriologie. 907 p. Berlin. 



Cites (p. 510) paper by Adametz. 



(19) NOYES, H. A. 



1915. soil sampling for bacteriological examination of soils. Jour. Amer. 

 Soc. Agron., v. 7, no. 5, p. 239-249, fig. 13, pl> 4. 



(20) and VoiGT, Edwin. 



I917. A TECHNIC for the BACTERIOLOGICAL EXAMINATION OF SOILS. In PrOC. 



Ind. Acad. Sci. 1916, p. 272-301, illus. 



(21) Petit, A. 



1913. DE la NITRIFICATION DANS LES TERRES HUMTF^RES acidES. In Ann. Sci. 



Agron., arm. 30 (s. 4, ann. 2), sem. 2, no. 4, p. 397-398. Abstract in Exp. 

 Sta. Rec, v. 30, no. 5, p. 424. 1914. 



(22) Schloesing, T., and MOntz, A. 



1877. SUR LA nitrification PAR LES FERMENTS ORGANISES. In Compt. Rend. 

 Acad. Sci. [Paris], t. 84, no. 7, p. 301-303. 



(23) Temple, J. C. 



1914. NITRIFICATION IN ACID OR NON-BASIC SOILS. Ga. AgT. Exp. Sta. Bul. 103, 



15 P- 



(24) UcKE, Alexander. 



1898. EiN BEiTRAG ZUR kennTnis dEr ANAfiROBEN. In Centbl. Bakt. [etc.], 

 Abt. I, Bd. 23, NO. 23, p. 996-1001. 



(25) Warington, Robert. 



1892. NITRIFICATION. NITRIFICATION AND DENTIFRICATION. In U. S. Dept. Agr. 



Exp. Sta. Bul. 8, p. 42-76. 



(26) White, J. W. 



1915. NITRIFICATION IN RELATION TO THE REACTION OF THE SOIL. In Penn. Agr. 



Exp. Sta. Ann. Rpt. 1913/14, p. 70-80, 4 pi. 



