14 SOIL BACTERIOLOGY 



Jahresbericht iiber die Landwirtschaft, Bd. i, i8S6. 



Journal of Agricultural Science, vol. i, 1906. 



Journal of American Society of Agronomy, vol. i, 1910. 



Journal of Bacteriology, vol. i, 1916. 



Journal of Biological Chemistry, vol. i, 1906. 



Journal of Industrial and Engineering Chemistry, vol. i, 1909. 



Journal of Infectious Diseases, vol. i, 1904. 



Journal fur Landwirtschaft, Bd. i, 1853. 



Landwirtschaftiiche Jahrbuchcr, Bd. i, 1872. 



Landwirtschaftliches Jahrbuch der Schweiz, Bd. i, 1887. 



Landwirtschaftiiche Versuchs-Stationen, Bd. i, 1859. 



Phytopathology, vol. i, 191 1. 



Soil Science, vol. i, 1916. 



Zeitsch. fur Garungs-Physiologie, Bd. i, 1912. 



Zeitschrift fiir das landw. Versuchswesen in Oesterreich, Bd. i, 1898. 



Agricultural Index, vol. i, 19 16. 



Experiment Station Record, vol. i, 1888. 



International Catalogue of Scientific Literature, 1901. 



Journal of Agricultural Research, vol. i, 1913. 



State Experiment Station Bulletins. 



United States Department of Agriculture Bulletins. 



LABORATORY RULES 



Read Carefully the FoUotving Rules: 



T. Before pouring plates or making transfers, wash off 

 the desk with a i : 1000 mercuric chlorid solution. Hold 

 the test-tube cultures to be transferred as nearly in a 

 horizontal position as possible. Avoid opening cultures 

 in a current of air. 



2. All cultures are to be grown in the incubator at 28"^ C. 

 unless otherwise stated. 



3. After using balances, always return weights to their 

 proper places. Do not leave any dust or dirt on balances. 



4. All soUd material, as soil, agar, cotton or filter- 

 paper, must be emptied into waste jars and not into the 

 sinks. 



