A LABORATORY GUIDE 



IN 



SOIL BACTERIOLOGY 



JACOB GOOD ALE LIPMAN, A.M., Ph.D., 



Professor of Soil Fertility and Bacteriology in Rutgers College 



AND 



Director of the New Jersey Agricultural Experiment Station, 



PERCY EDGAR BROWN, B.Sc, A.M., 



Assistant Professor of Soil Bacteriology in the Iowa State College 



AND 



Experimentalist in Soil Bacteriology, Iowa Experiment Station. 



I 9 I I 



