ROTHAMSTED CONFERENCES 

 XXll 



DISEASES OF BEES 



Contributions by 



SIR E. J. RUSSELL, D.Sc, F.R.S. 



H. L. A. TARR, Ph.D. 



G. D. MORISON, Ph.D. 



OTTO MORGENTHALER, Dr.(phil.) 



JAS. I. HAMBLETON, B.S., 



and others. 



Price 1/6 



ROTHAMSTED EXPERIMENTAL STATION 



HARPENDEN 



