274 
Journal of Agricultural Research 
Vol. XXIV. Na 3 
LITERATURE CITED 
i) Geri^ach and Vog^l. 
1902. WEITERB VERSUCHE MIT STICKSTOPPBINDENDEN BAKTERIEN. Ifl CentbL 
Bakt. [etc.], Abt. 2, Bd. 9, p. 817-821, 881-892. Bibliographical^foot- 
notes. 
(2) [Lipman, Jacob G.] 
1906. AZOTOBACTER STUDIES. In New Jersey Agr. Exp. Sta. 26th Ann. Rpt. 
1905, p. 254-280. 
(3) L6HNIS, F.,'and Piddai, N. K. 
1908. UEBER STiCKSTOFFPixiERENDE BAKTERIEN. III. /n Centbl. Bakt. [etc.], 
Abt. 2, Bd. 20, p. 781-799. Bibliographical footnotes. 
(4) Stoklasa, Julius. 
1908. BEITRAG ZUR KENNTNISS DER CHEMISCHEN VORGAnGE BEI DER ASSIMI¬ 
LATION DES ELEMENTAREN SliCKSTOFFS DURCH AZOTOBACTER UND 
RADiOBACTER. In Centbl. Bakt. [etc.], Abt. 2, Bd. 21, p. 620-632,3 pi, 
(5) NicollE, M., and Alilaire, E. 
1909. NOTE SUR LA PRODUCTION EN GRAND DES CORPS BACTERIENS ET SUR LEUR 
COMPOSITION CHiMiQUE. In Ann. Inst. Pasteur, ann. 23, p. 547-557, 
illus. 'Bibliographic, p. 557. 
(6) Hoffmann, C., and Hammer, B. W. 
1910. SOME FACTORS CONCERNED IN THE FIXATION OF NITROGEN BY AZOTO¬ 
BACTER. In Wis. Agr. Exp. Sta. Research Bui. 12, p. 155-172, 2 fig. 
(7) Omeliansky, W. L., and SiEber, N. O. 
1913. ZUR FRAGE NACH DER CHEMISCHEN ZUSAMMENSETZUNG DER BAKTERIEN- 
kOrpER DES AZOTOBACTER CHROOCOCCUM. In Ztschr. Physiol. Chem., 
Bd. 88, p. 445-459. Bibliographical footnotes. 
(8) Vaughan, Victor C., Vaughan, Victor C., Jr., and Vaughan, J. Walter. 
1913. PROTEIN SPLIT PRODUCTS, xii, 476 p., 34 fig. Philadelphia, New York. 
Bibliographical footnotes. 
(9) Shaffer, Philip A. 
1914. ON the determination of sugar in blood. In Jour. Biol. Chem., 
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(10) MockERIDGE, Florence Annie. 
1915. SOIL ORGANIC MATTER AS A CULTURE MEDIUM FOR AZOTOBACTER. In 
Biochem. Jour., v. 9, p. 272-283. References, p. 283. 
(11) Murray, T. J. 
1917. the effect of different plant tissues on the fixation of ATMOS¬ 
PHERIC NITROGEN. In Va. Agr. Exp. Sta. Tech. Bui. 15, p. 93-102. 
Literature cited, p. 102. 
(12) Hutchinson, Henry Brougham. 
1918. THE INFLUENCE OF PLANT RESIDUES ON NITROGEN FIXATION AND ON 
LOSSES OF NITRATE IN THE SOIL. In JOUT. Agr. Sci., V. 9, p. 92-III, 
3 fig. References, p. iii. 
(13) Pringsheim, H,, and Lichtenstein, Stephanie. 
1920. VERSUCHE ZUR ANREICHERUNG VON KRAFTSTROH MiT PILZEIWEISS, In 
Cellulosechemie, Wiss. Beiblatter Ztschr. '‘Der Papierfabrikant,*' 
Jahrg. I, p. 29-39. Illus. 
(14) Hunter, O. W. 
1923. stimulating the growth of AZOTOBACTER BY AERATION. In Jour. AgT. 
Research, v. 23, p. 665-667. Literature cited, p. 677. 
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