THE 



SCIENTIFIC I'ROCEK DINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. XVI. (If.S.), los. 30-34. PEBEQART, 1922. 



30.— SOME FACTORS AFFECTINa THE HYDROGEN lOK CON- 

 CENTRATION" OF THE SOIL AND ITS RELATION TO PLANT 

 DISTRIBUTION. By W. R. G. Atkins, O.B.E., Sc.D., F.I.C. 

 [Communicated by Professor H. H. Dixon, Sc.D., F.R.S.] 



31.— THE HYDROGEN ION CONCENTRATION OF PLANT CELLS. 

 By W. R. G. Atkins, O.B.E., Sc.D., F.LC. [Communicated by 

 Professor H. H. Dixon, Sc.D., F.R.S.] 



32.— NOTE ON THE OCCURRENCE OF THE FINGER AND TOE 

 DISEASE OF TURNIPS IN RELATION TO THE HYDROGEN 

 ION CONCENTRATION OF THE SOIL. By W. R. G. Atkins, 

 O.B.E., Sc.D., F.I.C. [Communicated by Professor H. H. Dixon,. 

 Sc.D., F.R.S.] 



33.— PHOTOSYNTHESIS AND THE ELECTRONIC THEORY (II). 

 By Henry H. Dixon, Sc.D., F.R.S., University Professor of Botany in 

 Trinity College, Dublin ; and Nigel G. Ball, M.A., Assistant to the 

 University Professor of Botany, Trinity College, Dublin. 



34— THE BIONOMICS OF THE CONIDIA OF PHYTOPHTHORA 

 INFESTANS (MONT.) DE BARY. By Paul A. Mukphy, B.A., 

 A.R.C.Sc.I., Assistant in the Seeds and Plant Disease Division, 

 Department of Agriculture and Technical Instruction for Ireland. 



I A uthors alone are responsible for all opinions expressed in their Communications-} 



DUBLIN : 



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