BIBLIOGRAPHY. I3I 



"Hairy vetch increased by 89 per cent. 

 "Canada field peas increased by 138 per cent. 

 "Crimson clover (young- plants) increased by 146 per cent. 

 "Germ fertilizer prepared for vetch was effective on Canada 

 field peas." 



BIBLIOGRAPHY. 

 The following list includes the more important papers to 

 which my attention has been called in studying the general sub- 

 ject. It does not purport to be complete, but may be helpful 

 in further study. Of most of the foreign publications a 

 somewhat free translation has been given rather than the full 

 title, the latter usually appearing in parenthesis. 



ANDREAE, ERNST.— Root tubercles in Ailanthus. (Ueber 

 abnorme Wurzelanschwellungen bei Ailanthus glandulosa.) 

 Inaug. diss. Erlangen 1894. Abstract, Bot. Gaz. XX; 496. 



ARNSTADT, A. — The present status of the nitrogen ques- 

 tion and its importance in farm management. (Die gegen 

 Wartige Lage der Stickstoff Frage und ihre Bedeutung fur den 

 landwirtschaftlichen Betrieb.) Leipsic: W. Diebener, 1893. 



ATKINSON, GEO. F.— Contribution to the biology of the 

 organism causing leguminous tubercles. Bot. Gaz. 18; 157, 

 226, 257. Contains many references to early literature not 

 included in this list. 



ATWATER, W. O. — On the assimilation of atmospheric 

 nitrogen by plants. Rep. Brit. A. A. S. 1884, p. 685. 



ATWATER, W. O. — Absorption of atmospheric nitrogen 

 by plants. Am. Chem. Jour. 6:365, 1885; also 12:526, 1891; 

 also 13:42, 1891. 



ATWATER, W. O. — Root tubercles and the acquisition of 

 nitrogen by Legumes. Inoculation experiments in field cul- 

 ture. Hellriegel and Wilfarth. Ex. Sta. Record III, 334, 

 Dec. 1891. 



ATWATER, W. O. and WOODS, C. D.— The acquisi- 

 tion of atmospheric nitrogen by plants. Rep. Storrs Ag. Ex. 

 Sta. 1889, pp 11-51. 

 9 



